Secondary pollutants like ammonium sulphate and nitrates in Kolkata's air, formed from vehicular, industrial, and ...

According to our results, primary and secondary pollutants had large variations at different sites of Lahore. The weekly average of PM 2.5 showed that concentration range of PM 2.5 at Wagah border was ...

Kolkata: A new study by Centre for Research on Energy and Clean Air (CREA) revealed that nearly one-third of Kolkata's PM2.5 pollution is caused by se.

Primary pollutants are those that result from the burning of fossil fuels from automobiles, coal plants and organic matter.

The report warns that these gases are forming toxic secondary pollutants, particularly ammonium sulfate, which accounts for ...