http://103.153.58.85/ind/index.php?action=history&feed=atom&title=Air_pollution%3A_DelhiAir pollution: Delhi - Revision history2026-05-31T23:05:54ZRevision history for this page on the wikiMediaWiki 1.19.2http://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=138765&oldid=prevJyoti: /* 2020-22/ Bad Air Takes 7.8 Years Off Delhiites’ Life Span: Chicago U */2025-12-14T22:03:59Z<p><span dir="auto"><span class="autocomment">2020-22/ Bad Air Takes 7.8 Years Off Delhiites’ Life Span: Chicago U</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div> “Delhi’s PM2.5 levels in 2022 were 17% lower compared to 2021. Since this is a single-year trend, it is difficult to distinguish between temporary factors like weather and permanent ones like policy implementation as the cause of this decline. However, if Delhi sustains this reduction, the average resident could live 1.6 years longer. One path to continuous improvement is by implementing forceful policies and making deliberate efforts to enforce standards. Many countries like the US, China and Japan have successfully reduced pollution through robust policies and effective implementation,” said Tanushree Ganguly, director, AQLI.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div> “Delhi’s PM2.5 levels in 2022 were 17% lower compared to 2021. Since this is a single-year trend, it is difficult to distinguish between temporary factors like weather and permanent ones like policy implementation as the cause of this decline. However, if Delhi sustains this reduction, the average resident could live 1.6 years longer. One path to continuous improvement is by implementing forceful policies and making deliberate efforts to enforce standards. Many countries like the US, China and Japan have successfully reduced pollution through robust policies and effective implementation,” said Tanushree Ganguly, director, AQLI.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">==Delhi, 2023: 15% deaths were due to polluted air==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[https://epaper.indiatimes.com/article-share?article=01_11_2025_001_013_cap_TOI  Kushagra.Dixit, Nov 1, 2025: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">New Delhi: One in seven deaths in Delhi in 2023 were due to polluted air, states the latest Global Burden of Disease (GBD) data released this month by the Institute for Health Metrics and Evaluation (IHME).</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> An analysis of the data by the Centre for Research on Energy and Clean Air (CREA) shows that ambient particulate matter pollution remains the single largest risk factor for deaths in Delhi, accounting for nearly 15% of all fatalities in 2023, numbering around 17,200. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">“In 2023, 9.4% of Delhi’s total disability-adjusted life years (DALYs) were attributable to particulate pollution, the highest in the country. This equates to nearly 4.9 lakh years of healthy life lost by Delhi’s population due to polluted air,” said Manoj Kumar, an analyst at CREA.</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=138079&oldid=prevPdewan: /* 2015-20 */2025-10-17T20:26:37Z<p><span dir="auto"><span class="autocomment">2015-20</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Diwali===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Diwali===</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">==== 2015-20====</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">See </ins>[[Diwali]]</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[<del class="diffchange diffchange-inline">File: Air pollution in Delhi on </del>Diwali<del class="diffchange diffchange-inline">, 2015-20.jpg|Air pollution in Delhi on Diwali, 2015-20 <br/> From: [https://epaper.timesgroup.com/Olive/ODN/TimesOfIndia/shared/ShowArticle.aspx?doc=TOIDEL%2F2020%2F11%2F16&entity=Ar00409&sk=999B6233&mode=image  November 16, 2020: ''The Times of India'']|frame|500px</del>]]</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div></div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">'''See graphic'''</del>:</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[Category</ins>:<ins class="diffchange diffchange-inline">Bangladesh|PAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHI</ins></div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del class="diffchange diffchange-inline">'' Air pollution in Delhi on Diwali, 2015</del>-<del class="diffchange diffchange-inline">20 ''</del></div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[Category:Development|PAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHI</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>====Diwali, New Year====</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>====Diwali, New Year====</div></td></tr>
</table>Pdewanhttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=137789&oldid=prevJyoti: /* Ozone/ 2019 */2025-09-22T11:57:44Z<p><span dir="auto"><span class="autocomment">Ozone/ 2019</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Ozone is a highly reactive gas that merits a short-duration standard of only one-toeight hours’ average, as opposed to a 24-hour average for other pollutants.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>Ozone is a highly reactive gas that merits a short-duration standard of only one-toeight hours’ average, as opposed to a 24-hour average for other pollutants.</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[https://epaper.indiatimes.com/article-share?article=29_08_2025_003_003_cap_TOI  Priyangi Agarwal, August 29, 2025: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">New Delhi : A new study has detected microplastics—tiny plastic particles—in Delhi’s air quality. The study found microplastics in three key particulate matter categories: PM10, PM2.5 and PM1. The study stated that although no threshold exists for safe microplastic inhalation, chronic exposure, particularly in occupational settings, may pose health risks, including asthma, bronchitis, pneumonia, lung inflammation and cancer.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Levels spiked significantly in summer when intense heat and stronger winds accelerated the breakdown of plastic waste. The study, titled ‘Characterisation and health risk assessment of airborne microplastics in DelhiNCR,’ was conducted by scientists from Indian Institute of Tropical Meteorology (IITM), Pune and Savitribai Phule Pune University.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> According to the study, particulate matter (PM10, PM2.5, and PM1) was collected at Lodhi Road during winter (Jan–March) and summer (April–June) of 2024. A total of 2,087 microplastics were identified in the air across all particulate samples during the study period in Delhi. Average concentrations were 1.87 microplastics per cubic metre for PM10, 0.51 microplastics per cubic metre for PM2.5, and 0.49 microplastics per cubic metre for PM1.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> “Microplastics likely originate from nearby plastic waste and trash discarded in open spaces. Meteorological conditions significantly influence the movement and dispersion of microplastics across the urban landscape, with winds potentially transporting them from surrounding regions into the city. Additionally, meteorological conditions play a crucial role in the movement and distribution of microplastics throughout the city,” said the study, adding that microplastics may contaminate food or be ingested during routine activities in polluted environments.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> The study found that microplastic particles were predominantly fragments and fibres composed mainly of polyethylene and polyethylene terephthalate. Fragments (66%) and fibres (32%) were the dominant morphologies, primarily white/ transparent and blue in colour, ranging from 1–1000 µm in size, it said.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> “The elevated concentrations during the summer season, along with evidence of long-range transport via prevailing winds, highlight the complex interplay between local emissions, atmospheric dynamics and urban microplastic pollution. Estimated daily inhalation exposure levels, particularly among sensitive populations such as children and infants, raise legitimate concerns regarding long-term health outcomes. While definitive toxicological thresholds for airborne microplastics have yet to be established, their ability to adsorb and transport hazardous contaminants suggests that even low-level exposure could contribute to cumulative respiratory and systemic health burdens,” said the research. The study emphasised the need to integrate microplastics into air quality frameworks and advocates for longterm, multi-site monitoring to evaluate their broader public health impacts.</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=137064&oldid=prevJyoti: /* 2015-18: Air quality during monsoons */2025-07-16T09:37:08Z<p><span dir="auto"><span class="autocomment">2015-18: Air quality during monsoons</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>While rainfall plays a big part in clearing air pollutants during the monsoon season, the data reveals that higher amount of rain doesn’t always bring cleaner air. For instance, rainfall in July 2017 (170.5mm at Safdarjung) was much lower than what was recorded during the same month this year and in 2016, but the air quality in 2017 was significantly better.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>While rainfall plays a big part in clearing air pollutants during the monsoon season, the data reveals that higher amount of rain doesn’t always bring cleaner air. For instance, rainfall in July 2017 (170.5mm at Safdarjung) was much lower than what was recorded during the same month this year and in 2016, but the air quality in 2017 was significantly better.</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">====2016-2025====</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[https://epaper.indiatimes.com/article-share?article=08_07_2025_007_011_cap_TOI  Priyangi Agarwal, July 8, 2025: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">New Delhi : The city recorded its 12th consecutive day of satisfactory air quality on Monday with an AQI of 85. Monsoon months are generally the cleanest in Delhi as favourable meteorological conditions, including rain and strong winds, help in settling pollutants down. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> During the monsoon last year, Delhi saw 27 consecutive days of satisfactory air quality, from July 28 to Aug 23. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The city experienced 13 such days in a row in the monsoon of 2023, 11 days in 2022, and 20 days in 2021. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">However, the monsoon of 2020, which was the Covid year, was the best with Delhi recording 51 straight days of satisfactory air quality, including four ‘good’ air days. A spell of 20 consecutive satisfactory days, including two good days, was seen each in 2019 and 2017. </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> Anumita Roychowdhury, executive director of research and advocacy at the Centre for Science and Environment (CSE), said: “The air quality during the monsoon months is substantially cleaner primarily because of the washout and cleansing effect of the rains and strong winds. The level of particulate matter reduces substantially and as a result, the toxic gaseous pollutants like ozone become the lead pollutant in the city.” She added that the cleaner air quality that is achieved due to the climatic and atmospheric conditions needs to be achieved year-round with the help of clean air action. Sunil Dahiya, founder and lead analyst at EnviroCatalysts, said: "Air quality is a function of emissions and meteorology. A higher number of rainy days and rainy hours wash down the pollution, reducing the concentrations, which ensures relatively cleaner days during the monsoon every year. We have seen good rainfall this season, which has definitely contributed to relatively cleaner June-July months so far compared to past years." </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> Delhi environment minister Manjinder Singh Sirsa said the best-performing hotspots were Rohini and Bawana on Monday with an AQI of 70. He said 6,471km of roads were swept, 594 KL of water was sprinkled across 1,071.45km of roads, 11,252 MT of garbage was removed, and 2,278.9 MT of construction and demolition waste was lifted on Monday. According to the Air Quality Early Warning System for Delhi, which is the forecasting body under the Union ministry of earth sciences, the air quality of Delhi is likely to remain satisfactory till July 10.</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Winter===</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>===Winter===</div></td></tr>
</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=133393&oldid=prevJyoti: /* 2018: 218 Deaths Every Year */2024-09-27T05:31:23Z<p><span dir="auto"><span class="autocomment">2018: 218 Deaths Every Year</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>CREA’s research highlighted that the health and economic impacts of coal-based power generation in Delhi-NCR were not limited to the region, but to many states. “Precursor gases, such as SO2 and NOx emitted by the power plants go on to form secondary particulate pollution, which can then travel hundreds of kilometers, exposing populations far from the point of origin to incremental hazardous pollution levels. Our study shows that this contribution was as high as 96% for Delhi-NCR from operation of 12 thermal power plants. It is important to reduce the emissions of SO2 & NOx if we want to control air pollution,” said Dahiya.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>CREA’s research highlighted that the health and economic impacts of coal-based power generation in Delhi-NCR were not limited to the region, but to many states. “Precursor gases, such as SO2 and NOx emitted by the power plants go on to form secondary particulate pollution, which can then travel hundreds of kilometers, exposing populations far from the point of origin to incremental hazardous pollution levels. Our study shows that this contribution was as high as 96% for Delhi-NCR from operation of 12 thermal power plants. It is important to reduce the emissions of SO2 & NOx if we want to control air pollution,” said Dahiya.</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:Bangladesh|PAIR POLLUTION: DELHIAIR POLLUTION: DELHI</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">==2020-22/ Bad Air Takes 7.8 Years Off Delhiites’ Life Span: Chicago U==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[https://epaper.indiatimes.com/article-share?article=29_08_2024_008_010_cap_TOI  Kushagra Dixit , Aug 29, 2024: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[File: Average PM2.5 levels in Delhi, 2020-22.jpg|Average PM2.5 levels in Delhi, 2020-22 <br/> From: [https://epaper.indiatimes.com/article-share?article=29_08_2024_008_010_cap_TOI  Kushagra Dixit , Aug 29, 2024: ''The Times of India'']|frame|500px]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">New Delhi : Cleaner air that meets WHO guidelines of 5 micrograms per cubic metre (µg/m3) can increase the life expectancy of Delhi’s 18.7 million residents by 7.8 years, according to a new report on Air Quality Life Index (AQLI) by Energy Policy Institute at University of Chicago (Epic). If the air quality is on par with the national standards of 40 µg/m3, the life expectancy can go up by 4.3 years, the study noted, taking the year 2022 as the baseline.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> “If all of India were to reduce particulate pollution to meet the WHO guideline, residents in Delhi would see the maximum benefits... In North 24 Parganas, the country’s second most populous district, residents would gain 3.6 years of life expectancy,” stated the AQLI report.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> The report also pointed out that Delhi was the most polluted city/state in India, with average PM2.5 in 2022 at 84.3 µg/m3. It was followed by UP with PM2.5 of 65.5 µg/m3. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">However, with an average annual PM2.5 concentration of 84.3 µg/m3 in 2022, Delhi has seen significant improvement, based on data from the previous Epic report that took 2021 as the base year. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">In Aug 2023, the Epic report stated that Delhi’s PM2.5 levels were 126.5 µg/m3 in 2021, as against 111.6 µg/m3 in 2020 and 124.4 µg/m3 in 2019. The report also said Delhi’s residents we- re on track to lose 11.9 years of life expectancy on an average relative to the WHO guidelines and 8.5 years relative to the national guidelines if the 2021 pollution levels persisted.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> The latest report, however, said after a decade of experiencing particulate pollution levels averaging about 49 µg/ m3 — more than nine times the WHO norms — particulate concentrations in India dropped to 41.4 µg/m3 in 2022. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">“If these reductions are sustained, an average Indian is likely to live nine months longer compared to what they would have if they were exposed to levels similar to the last decade. Further, if pollution met WHO guidelines, Indian citizens could gain 3.6 years,” the report said.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> While particulate pollution takes 3.6 years off the life of an Indian resident, malnutrition takes off 1.6 years, tobacco 1.5 years, and unsafe water and sanitation 8.4 months, it added.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> “Delhi’s PM2.5 levels in 2022 were 17% lower compared to 2021. Since this is a single-year trend, it is difficult to distinguish between temporary factors like weather and permanent ones like policy implementation as the cause of this decline. However, if Delhi sustains this reduction, the average resident could live 1.6 years longer. One path to continuous improvement is by implementing forceful policies and making deliberate efforts to enforce standards. Many countries like the US, China and Japan have successfully reduced pollution through robust policies and effective implementation,” said Tanushree Ganguly, director, AQLI.</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=130543&oldid=prevJyoti: /* 2018- 22 */2024-04-05T19:05:38Z<p><span dir="auto"><span class="autocomment">2018- 22</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'' Daily average AQI in Delhi during 2018- 22 ''</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'' Daily average AQI in Delhi during 2018- 22 ''</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">==2023: Paddy burning reduced But pollution is not==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[https://epaper.indiatimes.com/article-share?article=03_04_2024_006_027_cap_TOI  Priyangi Agarwal, April 3, 2024: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[File: 2021 – 23, farm fires in the areas surrounding Delhi and the contribution of stubble burning to Delhi’s air pollution.jpg| 2021 – 23: farm fires in the areas surrounding Delhi and the contribution of stubble burning to Delhi’s air pollution <br/> From: [https://epaper.indiatimes.com/article-share?article=03_04_2024_006_027_cap_TOI  Priyangi Agarwal, April 3, 2024: ''The Times of India'']|frame|500px]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">New Delhi: An analysis by scientists at Indian Institute of Tropical Meteorology (IITM), Pune, shows that paddy residue burning counts decreased in neighbouring states in the winter of 2023 but its impact in Delhi’s air quality was more than 2021 and 2022 due to meteorological conditions. </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">The Decision Support System, which is the forecasting body under the union ministry of earth sciences and developed by IITM, calculates the contribution of stubble burning in Delhi’s PM2.5 levels.</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> IITM scientists who analysed the data of the last three winters said the contribution of stubble burning in Delhi’s PM2.5 level was higher during the peak burning season from Oct 22 to Nov-end in 2023 as against the same period in 2022 and 2021. The data shared by the Commission for Air Quality Management (CAQM) in the national capital region and adjoining areas stated that the total fire counts in Punjab, Haryana, UP-NCR, Rajasthan-NCR and Delhi were 71,304 in 2021, 49,922 during 2022 and 36,663 in 2023 for the period from Sept 15 to Nov 30.</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> IITM said that in the winter of 2023 — from Oct 22 to Nov 30 — the contribution of stubble burning was above 10% in 58% of days, more than 15% in 44% days and over 20% in 30% days. However, the contribution of pollu- tants generated farm fires to Delhi’s air was over 10% for 32% of days each in 2022 and 2021. The impact of the farm fires on PM2.5 levels was above 15% in 30% of days in 2021 and 18% of days in 2022. </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">Sachin Ghude, a scientist at IITM, said: “Although the fire counts were less, meteorological conditions were conducive for the accumulation of emissions released from stubble burning and their transport from burning sites to Delhi.”</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> Experts said that wind movement played an important role in determining the impact of the emissions intrusion in Delhi’s air. Wind direction and speed are crucial factors. The north-westerly wind direction is favourable for the transport smoke from stubble burning sites to Delhi. Transfer of smoke from states to Delhi also depends on speed of transport level winds. If local winds are calm, it aggravates the stubble intrusion.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;"> Anumita Roychowdhury, executive director for research and advocacy at the Centre for Science and Environment, said: “This shows controlling crop burning can help to reduce peak pollution during some part of the season in winter. But this also means other sources dominate for most part of winter that requires urgent attention and action.”</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=129548&oldid=prevJyoti: /* 2023 study */2024-01-04T19:15:26Z<p><span dir="auto"><span class="autocomment">2023 study</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[https://timesofindia.indiatimes.com/city/delhi/90-reasons-why-your-city-is-so-polluted-new-delhis-major-air-pollution-sources-revealed/articleshow/106528853.cms  January 4, 2024: ''The Times of India'']</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>[https://timesofindia.indiatimes.com/city/delhi/90-reasons-why-your-city-is-so-polluted-new-delhis-major-air-pollution-sources-revealed/articleshow/106528853.cms  January 4, 2024: ''The Times of India'']</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div> In 2023, Delhi recorded an average daily PM2.5 concentration of 100 micrograms per cubic metre against 98 micrograms per cubic metre in 2022. The PM2.5 concentration in 2023 was 2.5 times higher than the annual national ambient air quality standard (NAAQS) and 20 times higher than the annual World Health Organization safe limit. The average daily PM10 concentration in 2023 was 205 micrograms per cubic metre, which is 3.4 times higher than the annual NAAQS and 13.7 times higher than the WHO norm.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div> In 2023, Delhi recorded an average daily PM2.5 concentration of 100 micrograms per cubic metre against 98 micrograms per cubic metre in 2022. The PM2.5 concentration in 2023 was 2.5 times higher than the annual national ambient air quality standard (NAAQS) and 20 times higher than the annual World Health Organization safe limit. The average daily PM10 concentration in 2023 was 205 micrograms per cubic metre, which is 3.4 times higher than the annual NAAQS and 13.7 times higher than the WHO norm.</div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=129546&oldid=prevJyoti: /* 2020: Seasonal variation in the sources of pollution */2024-01-04T19:14:29Z<p><span dir="auto"><span class="autocomment">2020: Seasonal variation in the sources of pollution</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The study stated that the average PM2.5 concentration was 240 micrograms per cubic metre in phase 1 (October 15 to November 15, 2020), 160 micrograms per cubic metre in phase 2 (November 15 to December 15) and 200 micrograms per cubic metre in phase 3 (December 15, 2020 to January 15, 2021). Delhi residents were exposed to air that does not meet the National Ambient Air Quality Standards (60 μg/m3) for more than half of 2020 despite low economic activity levels due to the pandemic-induced lockdown.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>The study stated that the average PM2.5 concentration was 240 micrograms per cubic metre in phase 1 (October 15 to November 15, 2020), 160 micrograms per cubic metre in phase 2 (November 15 to December 15) and 200 micrograms per cubic metre in phase 3 (December 15, 2020 to January 15, 2021). Delhi residents were exposed to air that does not meet the National Ambient Air Quality Standards (60 μg/m3) for more than half of 2020 despite low economic activity levels due to the pandemic-induced lockdown.</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:Bangladesh|PAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHI</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">==2023 study==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[https://timesofindia.indiatimes.com/city/delhi/90-reasons-why-your-city-is-so-polluted-new-delhis-major-air-pollution-sources-revealed/articleshow/106528853.cms  January 4, 2024: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[File: Major sources of pollution identified at 24 priority locations, 2024.jpg|Major sources of pollution identified at 24 priority locations, 2024 <br/> From: [https://timesofindia.indiatimes.com/city/delhi/90-reasons-why-your-city-is-so-polluted-new-delhis-major-air-pollution-sources-revealed/articleshow/106528853.cms  January 4, 2024: ''The Times of India'']|frame|500px]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Delhi government’s environment department has prepared an inventory of major air pollution sources at 24 priority areas in the city. The department has identified sources of pollution at all continuous ambient air quality monitoring stations (Caaqms) in Delhi and these include open burning of biomass, dumping of municipal waste, potholed roads, traffic congestion and construction activity. The department had earlier prepared a similar inventory of 13 pollution hotspots.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> An environment department official said on Wednesday, “We have identified major sources of pollution near all Caaqms in Delhi. We have shared the inventory with the agencies concerned so that the emissions can be reduced.”</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> The inventory relates to Alipur, Ayanagar, Burari crossing, CRRI-Mathura Road, Dr Karni Singh Shooting Range, Delhi Technological University, DU North Campus, Indira Gandhi International Airport, Institute of Human Behaviour and Allied Sciences, ITO, Jawaharlal Nehru Stadium, Lodhi Road, Najafgarh, National Stadium, Nehru Nagar, New Moti Bagh, Netaji Subhas University of Technology in Dwarka, Patparganj, Pusa (New Delhi), Pusa (Central), Shadipur, Siri Fort, Sonia Vihar and Sri Aurobindo Marg, according to the response provided by the government in response to a question asked in Delhi Assembly.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> A total of 90 varied pollution sources have been mapped at these 24 locations. In ITO, the main sources of pollution are heavy traffic movement and idling by vehicles with the waiting time at the intersection being 150-180 seconds, congestion stretching up to 120 metres on the crossing and a construction site at an aerial radius of around 200 metres. </ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Dumping of waste is the main source of pollution in Ayanagar. The inventory said waste matter was dumped on the main road in Ayanagar, the Chaudhary Dharamveer Netaji Marg and the Sunday market road near Mehrauli-Gurgaon Marg. The other contributor to pollution at Ayanagar was road dust, potholes, improper management of the road stretch in the Sunday market and traffic congestion at the T-point near Ayanagar.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> Anumita Roychowdhury, executive director (research and advocacy), Centre for Science and Environment, said, “Hyper local action at the neighbourhood and municipal ward scales is an important approach to reduce local toxic exposure. Local inventory of pollution sources allows more focused action. This needs to complement city level infrastructure development for overall pollution control.”</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline"> In 2023, Delhi recorded an average daily PM2.5 concentration of 100 micrograms per cubic metre against 98 micrograms per cubic metre in 2022. The PM2.5 concentration in 2023 was 2.5 times higher than the annual national ambient air quality standard (NAAQS) and 20 times higher than the annual World Health Organization safe limit. The average daily PM10 concentration in 2023 was 205 micrograms per cubic metre, which is 3.4 times higher than the annual NAAQS and 13.7 times higher than the WHO norm.</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=128852&oldid=prevJyoti: /* Seasons having high air pollution */2023-11-22T10:10:53Z<p><span dir="auto"><span class="autocomment">Seasons having high air pollution</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>She said the winter conditions cannot change but the authorities can bring down the pollution levels. “If the authorities take round-the-year action with a systemic approach, develop infrastructure and implement strategies, overall pollution can be reduced and the levels sustained. However, during extreme pollution episodes, immediate emergency measures are needed to ensure that pollution levels do not worsen,” she said.</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>She said the winter conditions cannot change but the authorities can bring down the pollution levels. “If the authorities take round-the-year action with a systemic approach, develop infrastructure and implement strategies, overall pollution can be reduced and the levels sustained. However, during extreme pollution episodes, immediate emergency measures are needed to ensure that pollution levels do not worsen,” she said.</div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">====2019-23====</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[File: AQI during Dussehra, 2019-23.jpg|AQI during Dussehra, 2019-23 <br/> From: [https://timesofindia.indiatimes.com/city/delhi/air-quality-dips-day-after-dussehra-in-delhi-may-stay-poor-for-now/articleshow/104710788.cms  Priyangi Agarwal, Oct 26, 2023: ''The Times of India'']|frame|500px]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">'''See graphic''':</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">'' AQI during Dussehra, 2019-23 ''</ins></div></td></tr>
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</table>Jyotihttp://103.153.58.85/ind/index.php?title=Air_pollution:_Delhi&diff=128528&oldid=prevJyoti: /* 2019> 2021 */2023-11-04T15:41:41Z<p><span dir="auto"><span class="autocomment">2019> 2021</span></span></p>
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<tr><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'' ’Hotspots’ with the worst air pollution in Delhi, 2019> 2021 ''</div></td><td class='diff-marker'> </td><td style="background: #eee; color:black; font-size: smaller;"><div>'' ’Hotspots’ with the worst air pollution in Delhi, 2019> 2021 ''</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div>[[Category:Bangladesh|PAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHIAIR POLLUTION: DELHI</div></td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">===2021-23===</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[https://epaper.timesgroup.com/article-share?article=29_09_2023_004_007_cap_TOI  Priyangi Agarwal, Sep 29, 2023: ''The Times of India'']</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">[[File: The most polluted areas of Delhi In the winter of 2022-23.jpg|The most polluted areas of Delhi In the winter of 2022-23 <br/> From: [https://epaper.timesgroup.com/article-share?article=29_09_2023_004_007_cap_TOI  Priyangi Agarwal, Sep 29, 2023: ''The Times of India'']|frame|500px]]</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">NEW DELHI: Delhi Pollution Control Committee (DPCC) has mapped and prepared an inventory of all major and minor pollution sources, along with their geo-coordinates, at all 13 hotspots in the city. Based on this, the winter action plans for each hotspot will be released.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">We mapped 470 major and minor pollution sources there, which helped improve the air quality as compared to the previous winter of 2021. Adopting the same model, we have now identified pollution sources at all 13 hotspots.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The inventory of all sources has been shared with the agencies concerned for resolving the issues at these hotspots. For instance, 12 major sources of pollution have been identified at Jahangirpuri, the most polluted hotspot during the last winter season (October 2022-January 2023) with an average PM2.5 concentration of 201 micrograms per cubic metre (g/m³).</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">The major sources include heavy traffic flow on the main road (NH-44) and Jahangirpuri-Azadpur stretch; the Bhalswa landfill and dust on the stretch connecting it to the main road; and a C&D waste recycling facility. DPCC also listed potholes among the pollution sources.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">An analysis by the Centre for Science and Environment last winter had stated that hotspots in north and east Delhi were the most polluted in the city and Jahangirpuri was the 'most polluted' official hotspot. Other most polluted hotspots were Anand Vihar (196 g/m³), Wazirpur (185 g/m³), Mundka (185 g/m³), Rohini (182 g/m³) and Bawana (179 g/m³).</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">Except R K Puram, all hotspots showed an improvement compared to average pollution levels recorded over the previous three winters, said CSE. R K Puram registered a 1% increase during the last winter season (October 2022-January 2023). Wazirpur (5%), Narela (3%) and Mayapuri (3%) registered improvements during the same period.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">According to Anumita Roychowdhury, executive director, research and advocacy, CSE, concrete local actions are needed to manage hotspots as these areas witness pollution levels higher than the city average.</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins class="diffchange diffchange-inline">"If these hotspots are managed well, the intensity of smog episodes and exposures can be lessened during the winter season. Some actions related to combustion sources like industry and vehicles will require city-wide interventions. These cannot be dealt at the hotspot-level alone. As winter pollution builds up due to meteorological conditions, local gross polluting activities need to be controlled," she said.</ins></div></td></tr>
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