Delhi no longer most polluted city; Gwalior, Allahabad top the chart in India

Delhi no longer most polluted city; Gwalior, Allahabad top the chart in India

The national capital was ranked ninth worst city in the survey, with an annual average PM 2.5 measurement of 122.

Indian cities less NO2 polluted than other major global counterparts

NASA scientists have used satellite observations to measure air pollution`s dependence on population in four of the planet`s major air pollution regions: the United States, Europe, China and India.