what is the unit of measurement for air pollution? Make two graphs, one for most polluted cities and second for least polluted cities in India.
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Answer:
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Explanation:

Dust & Construction contribute about 45% to the air pollution in India, which is followed by Waste Burning. Dust & Construction activities are mostly in the urban areas while Waste Burning is in the rural areas (agriculture).
Air pollution occurs when harmful or excessive quantities of substances including gases, particles, and biological molecules are introduced into the Earth's atmosphere. Air pollution in India is a serious issue, ranking higher than smoking, high blood pressure, child and maternal malnutrition, and risk factors for diabetes.[1] At least 140 million people breathe air 10 times or more over the WHO safe limit [2] and 13 of the world's 20 cities with the highest annual levels of air pollution are in India. [3] Air pollution contributes to the premature deaths of 2 million Indians every year. In urban areas, most 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 winter months, large scale crop residue burning in agriculture fields – a low cost alternative to mechanical tilling – is a major source of smoke, smog and particulate pollution.[4][5][6] India has a low per capita emissions of greenhouse gases but the country as a whole is the third largest after China and the United States.[7] A 2013 study on non-smokers has found that Indians have 30% lower lung function compared to Europeans.[8]
The Air (Prevention and Control of Pollution) Act was passed in 1981 to regulate air pollution and there have been some measurable improvements. However, the 2016 Environmental Performance Indexranked India 141 out of 180 countries.[9]
In 2015, Government of India, together with IIT Kanpur launched the National Air Quality Index.[10] 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
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