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Summary: This paper looks at the human health impacts from urban air pollution in India. Such pollution is especially harmful to poor people, so the co-benefits from global climate change policies in terms of reduced local air pollution can have positive equity impacts. Health impacts (mortality and morbidity) of PM10 pollution are quantified for different socio-economic groups in Delhi. The spatial PM10 concentration levels are overlaid with spatial socio-economic data. Improvement in air quality would result in bigger health benefits for the poor. Most measures that reduce PM10 pollutants also reduce CO2 emissions while simultaneously imposing more costs on the better-off. [ABSTRACT FROM AUTHOR]

Climate change and air pollution have important societal consequences, especially in emerging economies, wherein transitions from polluting technologies to cleaner alternatives coincide with high population vulnerability to environmental threats. India is home to a fifth of the world's population and a gamut of human activities, employing a far ranging spectrum of technologies and fuels, with consequent emissions. Atmospheric fine particles or aerosols in the region predominate in carbonaceous constituents and dust. Multi-institutional studies in the region have earlier focused on natural and anthropogenic climate forcing by aerosols and feedbacks on regional and global climate. Important gaps remain in understanding human activities influencing emissions, emission aerosol properties, and regional atmospheric processes, specifically those related to carbonaceous aerosol impacts on climate and air quality. With an aim to address these gaps, the COALESCE (Carbonaceous Aerosol Emissions, Source Apportionment and Climate Impacts) project was launched on 7 July 2017. The project adopts integration of scientific methods developed by both the climate and air quality research communities. New fundamental knowledge from the project and strong links to India's policy framework would enable climate and clean-air action in the region. The article describes the scientific rationale, objectives, and planned activities under COALESCE to explore engagement with the international climate and air quality research communities and to enable eventual dissemination of research findings, knowledge products, and decision-support tools. [ABSTRACT FROM AUTHOR]

Focuses on the formation of air quality index in India. Use of the index to assess and represent air quality status; Classification of air quality status to make an informative index; Calculation of long term air quality indices in cities with different climatological features.