1.   Cigarette smokers pollute the air for other people but take no account of this in Deciding how much to smoke.

2.   The air was heavily polluted with exhaust fumes.

3.   Car exhaust pollutes the air.

4.   It is hard to understand that we are polluting the air we breathe and the water we drink.

5.   The problem with furnaces is that they let a lot of gas products from the waste escape, causing havoc in the ozone layer, and polluting the air.

6.   A Washington Greenpeace spokesman claimed that existing oil production in Alaska leads to the dumping of waste and toxic chemicals, and pollutes the air.

7.   Mark smoke half a fag and leave it on your bench to pollute the air.

8.   Besides insecticides, there are other household chemicals that can pollute the air.

9.   Air-conditioners spew bits of metal and other debris into areas where scientists work, polluting the air they breathe.

10.   But across the tracks most of the trees have been cut down, the air is polluted, the drinking water foul, and the poverty is increasing.