Air pollution in India
{{Short description|none}}
{{Use Indian English|date=February 2016}}
File:Sources_of_Air_Pollution.png & Construction contribute about 45% to the air pollution in India, which is followed by Waste Burning. Crafting activities are mostly in the urban areas while Waste Burning is in the rural areas (agriculture).{{citation needed|date=November 2024}}]]
Air pollution in India is a serious environmental issue.{{Cite web|url=https://energy.economictimes.indiatimes.com/etanalytics/reports/coal/state-of-global-air-2019/640|title=State of global air 2019|access-date=29 April 2019|archive-date=14 May 2019|archive-url=https://web.archive.org/web/20190514214504/https://energy.economictimes.indiatimes.com/etanalytics/reports/coal/state-of-global-air-2019/640|url-status=live}} Of the 30 most polluted cities in the world, 21 were in India in 2019.{{Cite web|url=https://www.cnn.com/2020/02/25/health/most-polluted-cities-india-pakistan-intl-hnk/index.html|title=21 of the world's 30 cities with the worst air pollution are in India|first=Helen|last=Regan|website=CNN|date=25 February 2020 |access-date=2020-02-26|archive-date=2020-02-25|archive-url=https://web.archive.org/web/20200225222652/https://www.cnn.com/2020/02/25/health/most-polluted-cities-india-pakistan-intl-hnk/index.html|url-status=live}}{{Cite web|url=https://www.newsy.com/stories/21-of-top-30-worst-cities-for-air-pollution-were-in-india/|title=21 Of Top 30 Air Polluted Cities Last Year Were In India|last=Lowry|first=LeeAnne|website=Newsy|date=25 February 2020 |language=en|access-date=2020-02-26|archive-date=2020-02-26|archive-url=https://web.archive.org/web/20200226055518/https://www.newsy.com/stories/21-of-top-30-worst-cities-for-air-pollution-were-in-india/|url-status=live}} As per a study based on 2016 data, at least 140 million people in India breathe air that is 10 times or more over the WHO safe limit{{Cite web|url=https://ig.ft.com/india-pollution|title=Dirty air: how India became the most polluted country on earth|last1=Bernard|first1=Steven|last2=Kazmin|first2=Amy|date=December 11, 2018|website=ig.ft.com|language=en-GB|access-date=2019-03-04|archive-date=2019-09-30|archive-url=https://web.archive.org/web/20190930130506/https://ig.ft.com/india-pollution/|url-status=live}} and 13 of the world's 20 cities with the highest annual levels of air pollution are in India.{{Cite web|url=https://factor.niehs.nih.gov/2018/9/feature/3-feature-india/index.htm|title=India's air pollution, health burden get NIEHS attention (Environmental Factor, September 2018)|website=National Institute of Environmental Health Sciences|language=en|access-date=2019-03-04|archive-date=2019-03-06|archive-url=https://web.archive.org/web/20190306042723/https://factor.niehs.nih.gov/2018/9/feature/3-feature-india/index.htm|url-status=live}} The main contributors to India's particulate air pollution include industrial and vehicular emissions, construction dust and debris, dependence on thermal power for electricity, waste burning, and use of wood and dung by low-income and rural households for cooking and heating.{{cite journal |vauthors=Chakraborty J, Basu P |title=Air Quality and Environmental Injustice in India: Connecting Particulate Pollution to Social Disadvantages |journal=Int J Environ Res Public Health |volume=18 |issue=1 |date=January 2021 |page=304 |pmid=33406580 |doi=10.3390/ijerph18010304|doi-access=free |pmc=7795633 }} {{Creative Commons text attribution notice|cc=by4|from this source=yes}} 51% of India's air pollution is caused by industrial pollution, 27% by vehicles, 17% by crop burning and 5% by other sources.[https://indianexpress.com/article/cities/ahmedabad/want-govt-to-build-1600-km-green-wall-along-aravalli-says-activist-vijaypal-baghel-6182069/ Want govt to build 1600 km green wall along Aravalli] {{Webarchive|url=https://web.archive.org/web/20191224165431/https://indianexpress.com/article/cities/ahmedabad/want-govt-to-build-1600-km-green-wall-along-aravalli-says-activist-vijaypal-baghel-6182069/ |date=2019-12-24 }}, Indian Express, 24 December 2019.{{better source needed|date=November 2024}} Air pollution contributes to the premature deaths of 2 million Indians every year. Emissions come from vehicles and industry, whereas in rural areas, much of the pollution stems from biomass burning for cooking and keeping warm. In autumn and spring months, large scale crop residue burning in agriculture fields – a cheaper alternative to mechanical tilling – is a major source of smoke, smog and particulate pollution.{{cite journal |last1=Badarinath |first1=K.V.S |last2=Kharol|first2= Shailesh Kumar |last3=Sharma|first3=Anu Rani | name-list-style=amp |date=2009 |title=Long-range transport of aerosols from agriculture crop residue burning in Indo-Gangetic Plains—a study using LIDAR, ground measurements and satellite data |url=https://www.sciencedirect.com/science/article/pii/S1364682608002666 |journal=Journal of Atmospheric and Solar-Terrestrial Physics |volume=71 |issue=1 |pages=112–120 |doi=10.1016/j.jastp.2008.09.035 |bibcode=2009JASTP..71..112B |access-date=October 14, 2023|url-access=subscription }}[http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79630 Agricultural Fires in India] {{Webarchive|url=https://web.archive.org/web/20170118205238/http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=79630 |date=2017-01-18 }} NASA, United States (2012)Bob Weinhold, [http://ehp.niehs.nih.gov/119-a386/ Fields and Forests in Flames: Vegetation Smoke damages and Human Health] {{Webarchive|url=https://web.archive.org/web/20170629095404/https://ehp.niehs.nih.gov/119-a386/ |date=2017-06-29 }}, National Institutes of Health India has a low per capita emissions of greenhouse gases but the country as a whole is the third largest greenhouse gas producer after China and the United States.{{cite web|url=http://www.iea.org/co2highlights/co2highlights.pdf|title=CO2 EMISSIONS FROM FUEL COMBUSTION HIGHLIGHTS, 2011 Edition|year=2011|publisher=International Energy Agency, France|access-date=2012-09-05|archive-date=2012-02-02|archive-url=https://web.archive.org/web/20120202035728/http://www.iea.org/co2highlights/co2highlights.pdf|url-status=live}} A 2013 study on non-smokers has found that Indians have 30% weaker lung function than Europeans.{{cite news|title = Indians have 30% weaker lungs than Europeans|url = http://timesofindia.indiatimes.com/home/science/Indians-have-30-weaker-lungs-than-Europeans-Study/articleshow/22217540.cms|newspaper = Times of India|date = Sep 2, 2013|access-date = September 2, 2013|archive-date = July 24, 2019|archive-url = https://web.archive.org/web/20190724221735/https://timesofindia.indiatimes.com/home/science/Indians-have-30-weaker-lungs-than-Europeans-Study/articleshow/22217540.cms|url-status = live}}
The Air (Prevention and Control of Pollution) Act was passed in 1981 to regulate air pollution but has failed to reduce pollution because of poor enforcement of the rules.{{Cite web|date=2020-11-10|title=Air pollution law languishes toothless when air pollution surges|url=https://india.mongabay.com/2020/11/indias-40-year-old-law-to-combat-air-pollution-languishes-as-the-crisis-intensifies/|access-date=2021-01-26|website=Mongabay-India|language=en-US|archive-date=2021-02-02|archive-url=https://web.archive.org/web/20210202113350/https://india.mongabay.com/2020/11/indias-40-year-old-law-to-combat-air-pollution-languishes-as-the-crisis-intensifies/|url-status=live}}
In 2015, Government of India, together with IIT Kanpur launched the National Air Quality Index.{{Cite news|url=https://economictimes.indiatimes.com/environment/pollution/choking-india-gets-air-quality-index/articleshow/46830411.cms|title=Choking India gets air quality index|last=Mohan|first=Vishwa|date=2015-04-07|work=The Economic Times|access-date=2019-11-09|archive-date=2019-03-02|archive-url=https://web.archive.org/web/20190302011937/https://economictimes.indiatimes.com/environment/pollution/choking-india-gets-air-quality-index/articleshow/46830411.cms|url-status=live}} In 2019, India launched 'The National Clean Air Programme' with tentative national target of 20%-30% reduction in PM2.5 and PM10 concentrations by 2024, considering 2017 as the base year for comparison. It will be rolled out in 102 cities that are considered to have air quality worse than the National Ambient Air Quality Standards.{{cite web|url=http://www.indiaenvironmentportal.org.in/content/460562/national-clean-air-programme-ncap/|title=National Clean Air Programme|year=2019|access-date=18 January 2019|archive-date=20 December 2019|archive-url=https://web.archive.org/web/20191220161646/http://www.indiaenvironmentportal.org.in/content/460562/national-clean-air-programme-ncap/|url-status=live}} There are other initiatives such as a 1,600-kilometre-long and 5-kilometre-wide The Great Green Wall of Aravalli green ecological corridor along Aravalli range from Gujarat to Delhi which will also connect to Shivalik hill range with planting of 1.35 billion (135 crore) new native trees over 10 years to combat the pollution. In December 2019, IIT Bombay, in partnership with the McKelvey School of Engineering of Washington University in St. Louis, launched the Aerosol and Air Quality Research Facility to study air pollution in India.{{Cite web|url=https://source.wustl.edu/2019/12/new-partnership-brings-together-mckelvey-iit-bombay-to-study-air-pollution/|title=McKelvey Engineering, IIT Bombay partner to study air pollution {{!}} The Source {{!}} Washington University in St. Louis|date=2019-12-04|website=The Source|language=en-US|access-date=2020-02-14|archive-date=2020-05-10|archive-url=https://web.archive.org/web/20200510230336/https://source.wustl.edu/2019/12/new-partnership-brings-together-mckelvey-iit-bombay-to-study-air-pollution/|url-status=live}} According to a Lancet study, nearly 1.67 million deaths and an estimated loss of US$28.8 billion worth of output were India's prices for worsening air pollution in 2019.{{Cite web|date=September 29, 2021|first=Piyush|last=Aggarwal|title=Will an extended ban on firecrackers help improve the air we breathe?|url=https://www.indiatoday.in/diu/story/will-an-extended-ban-on-firecrackers-help-improve-the-air-we-breathe-1858861-2021-09-29|access-date=2021-10-13|website=India Today|language=en|archive-date=2021-10-19|archive-url=https://web.archive.org/web/20211019125148/https://www.indiatoday.in/diu/story/will-an-extended-ban-on-firecrackers-help-improve-the-air-we-breathe-1858861-2021-09-29|url-status=live}}
Causes
= Fuel and biomass burning =
{{Further information|Energy poverty and cooking}}
File:The rural stove,smoky,pollution,TamilNadu-230.jpeg
File:NP India burning 48 (6315309342).jpg, Punjab, India]]
Fuel wood and biomass burning is the primary reason for near-permanent haze and smoke observed above rural and urban India, and in satellite pictures of the country. Fuelwood and biomass cakes are used for cooking and general heating needs. These are burnt in cook stoves known as chulha (also chullha or chullah) in some parts of India. These cook stoves are present in over 100 million Indian households, and are used two to three times a day, daily. Some reports, including one by the World Health Organization, claim 300,000 to 400,000 people die of indoor air pollution and carbon monoxide poisoning in India because of biomass burning and use of chullhas.{{cite web|title=Green stoves to replace chullahs|date=December 3, 2009|url=https://timesofindia.indiatimes.com/india/Green-stoves-to-replace-chullahs/articleshow/5293563.cms|archive-url=https://archive.today/20120701180244/http://articles.timesofindia.indiatimes.com/2009-12-03/india/28096828_1_biomass-climate-renewable-energy-sources|url-status=live|work=The Times of India|archive-date=July 1, 2012}} The carbon containing gases released from biomass fuels are many times more reactive than cleaner fuels such as liquefied petroleum gas.{{Cite journal|last1=Stewart|first1=Gareth J.|last2=Nelson|first2=Beth S.|last3=Acton|first3=W. Joe F.|last4=Vaughan|first4=Adam R.|last5=Hopkins|first5=James R.|last6=Yunus|first6=Siti S. M.|last7=Hewitt|first7=C. Nicholas|last8=Nemitz|first8=Eiko|last9=Mandal|first9=Tuhin K.|last10=Gadi|first10=Ranu|last11=Sahu|first11=Lokesh K.|date=2021-02-25|title=Comprehensive organic emission profiles, secondary organic aerosol production potential, and OH reactivity of domestic fuel combustion in Delhi, India|journal=Environmental Science: Atmospheres|language=en|volume=1|issue=2|pages=104–117|doi=10.1039/D0EA00009D|issn=2634-3606|doi-access=free}} Air pollution is also the main cause of the Asian brown cloud, which is delaying the start of the monsoon. The Burning of biomass and firewood will not stop until electricity or clean burning fuel and combustion technologies become reliably available and widely adopted in rural and urban India.
India is the world's largest consumer of fuelwood, agricultural waste and biomass for energy purposes. From the most recent available nationwide study, India used 148.7 million tonnes coal replacement worth of fuel-wood and biomass annually for domestic energy use. India's national average annual per capita consumption of fuel wood, agricultural waste and biomass cakes was 206 kilogram coal equivalent.{{cite book|title=Fuelwood Studies in India: Myth and Reality|author=Devendra Pandey|year=2002|isbn=979-8764-92-7|publisher=Center for International Forestry Research|url=http://www.cifor.org/publications/pdf_files/Books/Fuelwood.pdf|access-date=2012-09-05|archive-date=2017-08-10|archive-url=https://web.archive.org/web/20170810214528/http://www.cifor.org/publications/pdf_files/Books/Fuelwood.pdf|url-status=live}} The overall contribution of fuelwood, including sawdust and wood waste, was about 46% of the total, the rest being agricultural waste and biomass dung cakes. Traditional fuel (fuelwood, crop residue and dung cake) dominates domestic energy use in rural India and accounts for about 90% of the total. In urban areas, this traditional fuel constitutes about 24% of the total. India burns tenfold more fuelwood every year than the United States; the fuelwood quality in India is different from the dry firewood of the United States; and, the Indian stoves in use are less efficient, thereby producing more smoke and air pollutants per kilogram equivalent.
The unsanctioned tyre pyrolysis plants, which recycle rubber tyres into low-grade oil and carbon black are widespread in India and contribute to severe air pollution and health problems.{{cite web |title=Burning tires: the murky oil business polluting parts of Asia|date=May 31, 2019|url=https://www.reuters.com/article/us-malaysia-poisoning-oil-insight-idUSKCN1T10AL|work=Reuters|access-date=October 16, 2023}}
=Fuel adulteration=
Some Indian taxis and auto-rickshaws run on adulterated fuel blends. Adulteration of gasoline and diesel with lower-priced fuels is common in South Asia, including India.{{cite web|title=Urban Air Pollution, Catching gasoline ad diesel adulteration|year=2002|publisher=The World Bank|url=http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/2002/09/13/000094946_02083104140124/Rendered/PDF/multi0page.pdf|access-date=2012-09-05|archive-date=2016-03-04|archive-url=https://web.archive.org/web/20160304050852/http://www-wds.worldbank.org/external/default/WDSContentServer/WDSP/IB/2002/09/13/000094946_02083104140124/Rendered/PDF/multi0page.pdf|url-status=live}} Some adulterants increase emissions of harmful pollutants from vehicles, worsening urban air pollution. Financial incentives arising from differential taxes are generally the primary cause of fuel adulteration. In India and other developing countries, gasoline carries a much higher tax than diesel, which in turn is taxed more than kerosene meant as a cooking fuel, while some solvents and lubricants carry little or no tax.
As fuel prices rise, the public transport driver cuts costs by blending the cheaper hydrocarbon into highly taxed hydrocarbon. The blending may be as much as 20–30 percent. For a low wage driver, the adulteration can yield short term savings that are significant over the month. The consequences to long term air pollution, quality of life and effect on health are simply ignored. Also ignored are the reduced life of vehicle engine and higher maintenance costs, particularly if the taxi, auto-rickshaw or truck is being rented for a daily fee.
Adulterated fuel increases tailpipe emissions of hydrocarbons (HC), carbon monoxide (CO), oxides of nitrogen (NOx) and particulate matter (PM). Air toxin emissions — which fall into the category of unregulated emissions — of primary concern are benzene and polyaromatic hydrocarbons (PAHs), both well-known carcinogens. Kerosene is more difficult to burn than gasoline, its addition results in higher levels of HC, CO and
PM emissions even from catalyst-equipped cars. The higher sulfur level of kerosene is another issue.
=Traffic congestion=
Traffic congestion is severe in India's cities and towns.{{Cite journal|last1=Akbar|first1=Prottoy A.|last2=Couture|first2=Victor|last3=Duranton|first3=Gilles|last4=Ghani|first4=Ejaz|last5=Storeygard|first5=Adam|date=August 2018|title=Mobility and Congestion in Urban India|url=https://documents.worldbank.org/curated/en/811261533850020988/pdf/WPS8546.pdf|journal=Macroeconomics, Trade and Investment Global Practice|publisher=World Bank Group|access-date=2021-03-07|archive-date=2020-03-31|archive-url=https://web.archive.org/web/20200331164141/http://documents.worldbank.org/curated/en/811261533850020988/pdf/WPS8546.pdf|url-status=live}}
- {{lay source |template=cite news |author=Varun B. Krishnan |date=23 November 2018 |title=How fast does traffic move in your city? |url=https://www.thehindu.com/opinion/op-ed/how-fast-does-traffic-move-in-your-city/article25570594.ece |newspaper=The Hindu}} Traffic congestion is caused by several reasons, some of which are: increase in number of vehicles per kilometre of available roads, a lack of intra-city divided-lane highways and intra-city expressways networks, lack of inter-city expressways, traffic accidents and chaos due to poor enforcement of traffic laws.
Traffic congestion reduces the average traffic speed. At low speeds, scientific studies reveal that vehicles burn fuel inefficiently and pollute more per trip. For example, a study in the United States found that for the same trip, cars consumed more fuel and polluted more if the traffic was congested, than when traffic flowed freely. An average trip speeds between 20 and 40 kilometres per hour, the cars pollutant emission was twice as much as when the average speed was 55 to 75 kilometres per hour. At average trip speeds between 5 and 20 kilometres per hour, the cars pollutant emissions were 4 to 8 times as much as when the average speed was 55 to 70 kilometres per hour.{{cite journal|title=Real-World CO2 Impacts of Traffic Congestion |journal=Transportation Research Record: Journal of the Transportation Research Board |author1=Matthew Barth |author2=Kanok Boriboonsomsin |date=November 2009 |doi=10.3141/2058-20 |volume=2058 |pages=163–171 |s2cid=2173204 |url=http://trb.metapress.com/content/n622635366032635/ |url-status=dead |archive-url=https://web.archive.org/web/20160530124628/http://trb.metapress.com/content/n622635366032635/ |archive-date=2016-05-30 }} Fuel efficiencies similarly were much worse with traffic congestion.
Traffic gridlock in Delhi and other Indian cities is extreme.{{cite web|title=Gridlocked Delhi: six years of career lost in traffic jams|date=September 5, 2010|publisher=India Today|url=http://indiatoday.intoday.in/story/gridlocked-delhi-six-years-of-career-lost-in-jams/1/111506.html|access-date=September 5, 2012|archive-date=February 13, 2017|archive-url=https://web.archive.org/web/20170213032210/http://indiatoday.intoday.in/story/gridlocked-delhi-six-years-of-career-lost-in-jams/1/111506.html|url-status=live}} This has been shown to result in a build up of local pollution, particularly under stagnant conditions.{{Cite journal|last1=Stewart|first1=Gareth J.|last2=Nelson|first2=Beth S.|last3=Drysdale|first3=Will S.|last4=Acton|first4=W. Joe F.|last5=Vaughan|first5=Adam R.|last6=Hopkins|first6=James R.|last7=Dunmore|first7=Rachel E.|last8=Hewitt|first8=C. Nicholas|last9=Nemitz|first9=Eiko|last10=Mullinger|first10=Neil|last11=Langford|first11=Ben|date=2020-08-13|title=Sources of non-methane hydrocarbons in surface air in Delhi, India|journal=Faraday Discussions|volume=226|pages=409–431|language=en|doi=10.1039/D0FD00087F|pmid=33336656|issn=1364-5498|doi-access=free}} The average trip speed on many Indian city roads is less than 20 kilometres per hour; a 10-kilometre trip can take 30 minutes, or more. At such speeds, vehicles in India emit air pollutants 4 to 8 times more than they would with less traffic congestion; Indian vehicles also consume a lot more carbon footprint fuel per trip, than they would if the traffic congestion was less. Emissions of particles and heavy metals increase over time because the growth of the fleet and mileage outpaces the efforts to curb emissions.{{cite journal |last1=Kumari |first1=R |last2=Attri |first2=AK |last3=Panis |first3=LI |last4=Gurjar |first4=BR |title=Emission estimates of particulate matter and heavy metals from mobile sources in Delhi (India). |journal=Journal of Environmental Science & Engineering |date=April 2013 |volume=55 |issue=2 |pages=127–42 |pmid=25464689 }}
In cities like Bangalore, around 50% of children suffer from asthma.{{cite news| url=https://timesofindia.indiatimes.com/city/bangalore/50-Bangalore-kids-hit-by-asthma/articleshow/2520601.cms | archive-url=https://archive.today/20120729144212/http://articles.timesofindia.indiatimes.com/2007-11-06/bangalore/27982035_1_asthma-school-buses-traffic-schools | url-status=live | archive-date=29 July 2012 | work=The Times of India | title=50% Bangalore kids hit by asthma | date=6 November 2007}}
= Construction dust and debris =
= Greenhouse gas emissions =
{{excerpt|Greenhouse gas emissions by India}}
Effects
= Health costs of air pollution =
The most important reason for concern over the worsening air pollution in the country is its effect on the health of individuals. Exposure to particulate matter for a long time can lead to respiratory and cardiovascular diseases such as asthma, bronchitis, COPD, lung cancer and heart attack.{{Cite web |date=2021-04-24 |title=Air Pollution in India – A Brief Highlight |url=https://www.downtoearth.org.in/blog/air/air-pollution-in-india-has-caused-losses-of-up-to-rs-7-lakh-crore-annually-76616 |access-date=2021-05-26 |archive-date=2021-06-13 |archive-url=https://web.archive.org/web/20210613154025/https://www.downtoearth.org.in/blog/air/air-pollution-in-india-has-caused-losses-of-up-to-rs-7-lakh-crore-annually-76616 |url-status=live }} The Global Burden of Disease Study for 2010, published in 2013, had found that outdoor air pollution was the fifth-largest killer in India and around 620,000 early deaths occurred from air pollution-related diseases in 2010.{{Cite web|url=https://www.livemint.com/Home-Page/Rz6u3kb13mDuXNzezwagAI/Emission-panel-for-panIndia-shift-to-Bharat-Stage-V-fuel-by.html|title=Emission panel for pan-India shift to Bharat Stage V fuel by 2020|last1=Rao|first1=Kirthi V.|last2=Raj|first2=Amrit|date=2014-05-12|website=livemint.com|language=en|access-date=2019-08-17|last3=Sethi|first3=Neha|archive-date=2019-08-17|archive-url=https://web.archive.org/web/20190817183850/https://www.livemint.com/Home-Page/Rz6u3kb13mDuXNzezwagAI/Emission-panel-for-panIndia-shift-to-Bharat-Stage-V-fuel-by.html|url-status=live}} According to a WHO study, 13 of the 20 most-polluted cities in the world are in India; however, the accuracy and methodology of the WHO study was questioned by the Government of India. India also has one of the highest number of COPD patients and the highest number of deaths due to COPD.
Over a million Indians die prematurely every year due to air pollution, according to the non-profit Health Effects Institute.{{cite news | title=US exporting dirty fuel to pollution-choked India | publisher=Bay Area News Group |work=San Jose Mercury-News |page=A4 |author1=Tammy Webber | author2=Katy Daigle |agency=AP}} Over two million children—half the children in Delhi—have abnormalities in their lung function, according to the Delhi Heart and Lung Institute. Over the past decade air pollution has increased in India significantly. Asthma is the most common health problem faced by Indians and it accounts for more than half of the health issues caused by air pollution.{{cite journal |last=Bhome |first=Arvind B. |date=2012-06-14 |title=COPD in India: Iceberg or volcano? |journal=Journal of Thoracic Disease |volume=4 |issue=3 |pages=298–309–309 |doi=10.3978/j.issn.2072-1439.2012.03.15 |pmc=3378191 |pmid=22754670 }}{{Cite news|url=https://www.thehindu.com/news/cities/chennai/chennais-air-quality-pretty-bad-says-respiratory-physician/article29889578.ece|title=Chennai's air quality pretty bad, says respiratory physician|date=2019-11-05|work=The Hindu|access-date=2019-11-09|language=en-IN|issn=0971-751X|archive-date=2019-12-27|archive-url=https://web.archive.org/web/20191227192052/https://www.thehindu.com/news/cities/chennai/chennais-air-quality-pretty-bad-says-respiratory-physician/article29889578.ece|url-status=live}} Air pollution is believed to be one of the key factors in accelerating the onset of Alzheimer's disease in India.{{Cite news | url=https://www.thenationalnews.com/world/asia/2023/09/21/world-alzheimers-day-india-pollution/ | title=Indian experts urge government to curb air pollution linked to Alzheimer's disease | author=Taniya Dutta| work=The National |date=2023-09-21}}
The Global Burden of Disease Study of 2017 analysed in a report by The Lancet indicated that 76.8% of Indians are exposed to higher ambient particulate matter over 40 μg/m3, which is significantly above the national limit recommenced by national guidelines on ambient air pollution.
The study estimated that of 480.7 million Disability-Adjusted Life Years in India 4.4% of could be ascribed to ambient particulate matter pollution and 15.8 million of them were the result of polluted air in households. In terms of average life expectancy it is suggested that average life expectancy in India would increase by 1.7 years if exposure was limited to national minimum recommendations.{{cite journal |last1=Balakrishnan |first1=K |title=The impact of air pollution on deaths, disease burden, and life expectancy across the states of India: the Global Burden of Disease Study 2017 |journal=The Lancet Planetary Health |date=January 1, 2019 |volume=1 |issue=3 |pages=e26–e39 |doi=10.1016/S2542-5196(18)30261-4 |pmid=30528905 |pmc=6358127 |doi-access=free }}
Ambient air pollution in India is estimated to cause 670,000 deaths annually and particularly aggravates respiratory and cardiovascular conditions including chronic bronchitis, lung cancer and asthma. Ambient air pollution is linked to an increase in hospital visits, with a higher concentration of outdoor pollution particulates resulting in emergency room visit increases of between 20 and 25% for a range of conditions associated with higher exposure to air pollution. Approximately 76% of households in rural India are reliant on solid biomass for cooking purposes which contributes further to the disease burden of ambient air pollution experienced by the population of India.{{cite journal |last1=Rajak |first1=Rahul |title= Short and long-term exposure to ambient air pollution and impact on health in India: a systematic review7 |journal= International Journal of Environmental Health Research |date=May 9, 2019 |volume=1 |issue=25 |pages=593–617 |doi=10.1080/09603123.2019.1612042 |pmid=31070475 |s2cid=148570538 }}
= State-Wide Trends =
According to the WHO, India has 14 out of the 15 most polluted cities in the world in terms of PM 2.5 concentrations. Other Indian cities that registered very high levels of PM2.5 pollutants are Delhi, Patna, Agra, Muzaffarpur, Srinagar, Gurgaon, Jaipur, Patiala and Jodhpur, followed by Ali Subah Al-Salem in Kuwait and a few cities in China and Mongolia.{{Cite news|url=https://timesofindia.indiatimes.com/india/india-tops-world-in-bad-air-quality-kanpur-delhi-among-top-15-mumbai-4th-most-polluted-megacity/articleshow/63997130.cms|title=India tops world in bad air quality: Kanpur, Delhi among 15 worst cities, Mumbai 4th most polluted megacity - Times of India|website=The Times of India|date=2 May 2018 |access-date=2019-03-09|archive-date=2019-05-22|archive-url=https://web.archive.org/web/20190522173121/https://timesofindia.indiatimes.com/india/india-tops-world-in-bad-air-quality-kanpur-delhi-among-top-15-mumbai-4th-most-polluted-megacity/articleshow/63997130.cms|url-status=live}}
Air Quality Index (AQI) is a number used to communicate the level of pollution in the air and it essentially tells you the level of pollution in the air in a given city on a given day. The AQI of Delhi was placed under the "severe-plus category" when it touched 574, by the System of Air Quality and Weather Forecasting And Research.{{Cite news|url=https://www.indiatoday.in/india/story/delhi-smog-air-pollution-diwali-firecrackers-1384147-2018-11-08|title=Delhi records worst air quality of year after rampantly bursting crackers|newspaper=India Today|language=en|access-date=2019-03-13|agency=Ist|archive-date=2019-01-06|archive-url=https://web.archive.org/web/20190106183423/https://www.indiatoday.in/india/story/delhi-smog-air-pollution-diwali-firecrackers-1384147-2018-11-08|url-status=live}} In May 2014 the World Health Organization announced New Delhi as the most polluted city in the world.{{Cite news|url=http://qz.com/281251/here-is-why-india-has-no-clue-how-bad-its-air-pollution-problem-is/|title=Here is why India has no clue how bad its air pollution problem is|last=Madhok|first=Madhok|date=16 October 2014|access-date=December 4, 2015|publisher=Quartz India|archive-date=8 December 2015|archive-url=https://web.archive.org/web/20151208151525/http://qz.com/281251/here-is-why-india-has-no-clue-how-bad-its-air-pollution-problem-is/|url-status=live}} In November 2016, the Great smog of Delhi was an environmental event which saw New Delhi and adjoining areas in a dense blanket of smog, which was the worst in 17 years.
File:2018 Air Pollution in NewDelhi (PM2.5 AQI).svg
class="wikitable"
|+Top 13 Cities in India with the highest level of PM 2.5 !Cities !PM2.5 Levels |
Delhi
|153 |
Patna
|149 |
Gwalior
|144 |
Raipur
|134 |
Ahmedabad
|100 |
Lucknow
|96 |
Firozabad
|96 |
Kanpur
|93 |
Amritsar
|92 |
Ludhiana
|91 |
Prayagraj
|88 |
Agra
|88 |
Khanna
|88 |
India's Central Pollution Control Board now routinely monitors four air pollutants namely sulphur dioxide (SO2), oxides of nitrogen (NOx), suspended particulate matter (SPM) and respirable particulate matter (PM10). These are target air pollutants for regular monitoring at 308 operating stations in 115 cities/towns in 25 states and 4 Union Territories of India. The monitoring of meteorological parameters such as wind speed and direction, relative humidity and temperature has also been integrated with the monitoring of air quality. The monitoring of these pollutants is carried out for 24 hours (4-hourly sampling for gaseous pollutants and 8-hourly sampling for particulate matter) with a frequency of twice a week, to yield 104 observations in a year.
The key findings of India's central pollution control board are:{{cite web|title=NATIONAL AIR QUALITY MONITORING PROGRAMME|year=2011|publisher=Ministry of Environment & Forests, Government of India|url=http://cpcbenvis.nic.in/airpollution/finding.htm|access-date=2012-09-05|archive-date=2008-01-11|archive-url=https://web.archive.org/web/20080111092345/http://cpcbenvis.nic.in/airpollution/finding.htm|url-status=live}}
- Most Indian cities continue to violate India's and world air quality PM10 targets. Respirable particulate matter pollution remains a key challenge for India. Despite the general non-attainment, some cities showed far more improvement than others. A decreasing trend has been observed in PM10 levels in cities like Solapur and Ahmedabad over the last few years. This improvement may be due to local measures taken to reduce Sulphur in diesel and stringent enforcement by the government.
- A decreasing trend has been observed in Sulphur dioxide levels in residential areas of many cities such as Delhi, Mumbai, Lucknow, Bhopal during last few years. The decreasing trend in Sulphur dioxide levels may be due to recently introduced clean fuel standards, and the increasing use of LPG as domestic fuel instead of coal or fuelwood, and the use of CNG instead of diesel in certain vehicles.
- A decreasing trend has been observed in nitrogen dioxide levels in residential areas of some cities such as Bhopal and Solapur during last few years.
- Most Indian cities greatly exceed acceptable levels of suspended particulate matter. This may be because of refuse and biomass burning, vehicles, power plant emissions, industrial sources.
- The Indian air quality monitoring stations reported lower levels of PM10 and suspended particulate matter during monsoon months possibly due to wet deposition and air scrubbing by rainfall. Higher levels of particulates were observed during winter months possibly due to lower mixing heights and more calm conditions. In other words, India's air quality worsens in winter months, and improves with the onset of monsoon season.
- The average annual SOx and NOx emissions level and periodic violations in industrial areas of India were significantly and surprisingly lower than the emission and violations in residential areas of India
- Of the four major Indian cities, air pollution was consistently worse in Delhi, every year over 5-year period (2004–2018). Kolkata was a close second, followed by Mumbai. Chennai air pollution was least of the four.
Major events
{{expand section|date=November 2024}}
= 2024 Indo-Pakistani smog =
{{main|2024 Indo-Pakistani smog}}
Pollution in Delhi reached drastic levels following Diwali celebrations, when illegal firecracker use temporarily pushed the city's pollution levels above Lahore's during the morning of 8 November.{{Cite news |last1=Baloch |first1=Shah Meer |last2=Ellis-Petersen |first2=Hannah |date=2024-11-01 |title='More toxic than ever': Lahore and Delhi choked by smog as 'pollution season' begins |url=https://www.theguardian.com/world/2024/nov/01/lahore-delhi-choked-smog-pollution-season-india-pakistan |access-date=2024-11-12 |work=The Guardian}} The air quality index of New Delhi (capital of India) dropped into the severe category in November 2024 according to SAFAR, India’s main environmental agency.{{cite web | last=Rai | first=Arpan | title=Delhi becomes world's most polluted city as AQI levels reach 1,000 | website=The Independent | date=13 Nov 2024 | url=https://www.independent.co.uk/climate-change/news/delhi-aqi-today-air-pollution-latest-b2646187.html | access-date=18 Nov 2024}} On November 18, "Swiss group IQAir ranks New Delhi as the world's most polluted city with air quality at a 'hazardous' 1,081."{{cite web | last=Mehta | first=Tanvi | title=India's north shrouded in smog as Delhi pollution hits season high | website=Reuters | date=18 Nov 2024 | url=https://www.reuters.com/world/india/shrouded-smog-delhi-pollution-reading-is-highest-this-year-2024-11-18/ | access-date=18 Nov 2024}} Government has ordered schools to close and construction to cease to tackle the issue.{{cite web | last=Lynch | first=Niamh | title=New Delhi air pollution: Schools closed and construction stopped as smog worsens to levels far above WHO safety limit | website=Sky News | date=18 Nov 2024 | url=https://news.sky.com/story/new-delhi-air-pollution-schools-closed-and-construction-stopped-as-smog-worsens-to-levels-far-above-who-safety-limit-13256082 | access-date=18 Nov 2024}} The reading of the city dropped to 489 in the next day (November 19), although it was still the most polluted in the world.{{cite web | title=Toxic smog persists over India's north, schools reopen in Pakistan | website=Reuters | date=19 Nov 2024 | url=https://www.reuters.com/world/india/toxic-smog-persists-over-indias-north-delhi-pollution-remains-severe-2024-11-19/ | access-date=1 Dec 2024}}
Steps taken
- The government in Delhi launched an Odd-Even Rule in November, 2017 which is based on the Odd-Even rationing method: This meant that cars running with number plates ending in Odd digits could only be driven on certain days of the week, while the Even digit cars could be driven on the remaining days of the week.{{Cite web|url=https://www.carandbike.com/news/odd-even-in-delhi-5-things-you-need-to-know-1773720|title=Odd-Even Rule: 5 Things You Need to Know - NDTV CarAndBike|website=CarAndBike|language=en|access-date=2019-03-13|archive-date=2020-08-06|archive-url=https://web.archive.org/web/20200806195745/https://www.carandbike.com/news/odd-even-in-delhi-5-things-you-need-to-know-1773720|url-status=live}}
- Local governments of various states also implemented measures such as tighter vehicle emissions' norms, higher penalties for burning rubbish and better control of road dust.
- The Indian government has committed to a 50% reduction in households using solid fuel for cooking{{Cite journal|title=WHO {{!}} India takes steps to curb air pollution|journal=Bulletin of the World Health Organization|year=2016|volume=94|issue=7|pages=487–8|doi=10.2471/BLT.16.020716|pmid=27429486|pmc=4933146|doi-access=free}}
- Some goals set for future are:
- Clean up the transportation sector by introducing 1,000 electric public transport buses to its existing 550 busses.
- Upgrade all fossil fuel combustion engine vehicles to BS6 emission standards
- Meet a goal of 25% of private vehicles to be electricity powered by 2023
- Renewable energy in all power plants
- Provide farmers with a machine called a Happy Seeder which converts agricultural residue to fertilizer
- Encourage crop diversification to farmers and grow sustainable water-conserving crops such as coarse grains and pulses.
- Analyze health data and study the efficiency of different room filtration systems in areas where indoor air pollution is highest.
- Identify effective ways to inform the public about air pollution data
- Launch new citizen science programs to better document exposures{{Cite web|url=https://cen.acs.org/environment/pollution/Searching-solutions-Delhis-air-pollution/97/i7|title=Searching for solutions to Delhi's air pollution problem|website=Chemical & Engineering News|language=en|access-date=2019-03-09|archive-date=2019-07-13|archive-url=https://web.archive.org/web/20190713040139/https://cen.acs.org/environment/pollution/Searching-solutions-Delhis-air-pollution/97/i7|url-status=live}}
- Reduce Carbon Emissions: "According to Inter-governmental Panel on Climate Change, to limit warming well below 2 degree Celsius, CO2 emissions should decline by about 20 per cent by 2030 and reach net zero around 2075; to limit warming below 1.5 degree Celsius, CO2 emissions should decline by 50 per cent by 2030 and reach net zero by around 2050..."{{Cite web|url=https://indianexpress.com/article/india/india-drives-global-rise-in-co2-emissions-report-5480529/|title=India drives global rise in CO2 emissions: Report|date=2018-12-06|website=The Indian Express|language=en-IN|access-date=2019-03-13|archive-date=2018-12-06|archive-url=https://web.archive.org/web/20181206115152/https://indianexpress.com/article/india/india-drives-global-rise-in-co2-emissions-report-5480529/|url-status=live}}
- Improve air quality monitoring by deploying more stations and utilizing IoT-based mobile and drive-by sensing approaches.{{cite conference | url = https://dl.acm.org/doi/10.1145/3378393.3402275 | title = Modulo: Drive-by Sensing at City-scale on the Cheap | last1 = Agarwal | first1 = Dhruv | last2 = Iyengar | first2 = Srinivasan | last3 = Swaminathan | first3 = Manohar | last4 = Sharma | first4 = Eash | last5 = Raj | first5 = Ashish | last6 = Hatwar | first6 = Aadithya | date = 2020 | publisher = Association for Computing Machinery | pages = 187–197 | location = Ecuador | doi = 10.1145/3378393.3402275 | isbn = 9781450371292 | conference = COMPASS '20| url-access = subscription }}
See also
- Air pollution in Delhi
- Firecrackers in India
- List of Kerala cities by ambient air quality
- Hydrogen internal combustion engine auto rickshaw
- Air pollution measurement
- BioDME: low-pollution fuel for diesel generators
- Steam reforming of natural gas with methane pyrolysis: CO2-neutral hydrogen production from natural gas
- Petroleum coke
- List of most-polluted cities by particulate matter concentration
- List of least polluted cities by particulate matter concentration
- Criteria air pollutants
- Ghazipur landfill
- Bhalswa landfill
References
{{reflist|30em}}
Further reading
- {{cite web |last1=Sengupta |first1=Ramprasad |last2=Mandal |first2=Subrata |title=Health Damage Cost of Automotive Air Pollution : Cost Benefit Analysis of Fuel Quality Upgradation for Indian Cities |url=http://www.nipfp.org.in/media/medialibrary/2013/04/wp05_nipfp_039.pdf |access-date=22 July 2014 |ref=none}}
- {{cite web|last1=Cropper|first1=Maureen|title=The Health Effects of Coal Electricity Generation in India|url=http://www.hks.harvard.edu/m-rcbg/rpp/RFF-DP-12-25.pdf|access-date=22 July 2014|date=June 2012 |ref=none}}
External links
{{Landfills in india}}
{{Asia Pollution}}
{{Asia topic|Air pollution in}}