Question

what are main sources of air pollution? what measures are being taken to check air pollution in these big cities?

Answer 1

The main source of air pollution are smoke emitting from chimneys,smoke from petrol and diesel vehicles,big factories using big machines for production of their product.

Answer 2

The causes for air pollution is using of high motors or machines. Every city should have air pollution checking machines. They should apply some fines to whom they're using high emiting polluted air vechiles.