Millions of lives in India have been lost because of air pollution. The programme Insight looks at how a growing middle class ...

Delhi and Varanasi are among the 14 Indian cities that figured in a list of 20 most polluted cities in the world in terms of PM2.5 levels in 2016, data released by the WHO showed. The WHO data also ...

The lists are based on the average number of days declared 'unhealthy' by government environmental agencies, with the most ...

The report then ranks the most polluted and cleanest U.S. cities based on an area’s number of unhealthy air days and the city’s particulate pollution. The Detroit-Warren-Ann Arbor area comes ...

The designation was awarded by a London-based charity that aims to make cities more like national parks: "greener, healthier ...

The report then ranks the most polluted and cleanest U.S. cities based on an area’s number of unhealthy air days and the city’s particulate pollution. This year’s report looked at a three ...