Bengal air pollution: marginal improvement but still a lot to catch up; Durgapur eight most polluted
A report card released recently shows that the level of the most toxic ultrafine particulate – PM 2.5 – has improved marginally in Kolkata during the last 4 years even after pumping hundreds of crores for pollution reduction, though the level is still well above the permissible limit in the country. PM 2.5 can penetrate