India’s PM2.5 Largely Chemically Formed, Not Directly Emitted
A large share of India’s PM2.5 pollution is not emitted directly but is chemically formed in the atmosphere from precursor gases, according to a new analysis by the Centre for Research on Energy and Clean Air (CREA). Up to 42 per cent of India’s PM2.5 burden is secondary particulate matter, primarily ammonium sulphate formed from…