No Indian district meets WHO air quality standards: Study
No Indian district meets the World Health Organisation's (WHO) safe air quality limit for PM2.5, a study by the Centre for Research on Energy and Clean Air (CREA) stated. The study claimed that the top 50 most polluted districts are mostly concentrated in four states – Delhi, Assam, Haryana, and Bihar. According to study, Delhi is the most polluted state/UT.