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

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

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.

Combatting air pollution in China: Why secondary pollutants are now a primary concern Peer-Reviewed Publication. Institute of Atmospheric Physics, Chinese Academy of Sciences ...

Conversely, they found a small increase (0.6%) in primary and secondary productivity in the northern Indian Ocean in response ...