Human exposure to particulate matter (PM) was determined in Urban Environment of Delhi, India. Samples were collected using eight stages impactor (Marple Cascade Impactor) at five sites during August to October 2011. Three samples were collected from each site; samples were analyzed in eight size ranges gravimetrically and chemically (for metals). Maximum (985 μg m-3) exposure to PM was in Okhala an industrial site and minimum (404 μg m-3) in Jawaharlal Nehru University, an educational Institute.

There has been enough discussion on the quantum of power the country needs. While estimates would largely be a function of assumptions, the fact remains that we need as much power as is possible, at least for now
Arun Srivastava

Steeped in pollution, Ranchi lake is no more a crowd puller