Around one-third of Delhi’s annual PM2.5 pollution is made up of secondary ammonium sulfate, with its share rising sharply ...

Around one-third of Delhi's annual PM2.5 pollution is secondary ammonium sulfate, primarily resulting from coal plants, industries and agriculture.

A CREA analysis reveals that 42% of India's PM2.5 pollution originates from secondary particulate matter, mainly ammonium ...

New Delhi, A large share of India's PM2.5 pollution is not emitted directly but is chemically formed in the atmosphere from precursor gases with 42 per cent of the burden being secondary particulate ...

This pollution -- small enough to penetrate deep into the lungs and bloodstream -- has been linked to depression in previous ...