Kolkata is the second most polluted city in the world, according to a recent report of HEI SoGA, second after the national capital Delhi. In the report, based on the quantity of PM2.5 and nitrogen...
Kolkata
Kolkata is the second most polluted city in the world, according to a recent report of HEI SoGA, second after the national capital Delhi. In the report, based on the quantity of PM2.5 and nitrogen...