If we see rubbish, we should do our part in protecting the land (4)_________ picking it up and throwing it in dust bins.

Pollution of soil reduces the amount of land that is available for (6)_________food.

Badly polluted air can cause illness, and (4)__________death.

Air, water and soil are necessary to the (3)_______of all living things.

Man also pollutes his surroundings (28)_____ various other ways.

Man dirties the air with exhaust gases and smoke, poisons the water with chemicals and (2)_____ substances, and damages the soil with too many fertilizers and pesticides.

Environmental pollution is a term that (1)______ to all the ways by which man pollutes his surroundings.

Soils and groundwater contain (5)__________ residue of human agricultural practices and also improperly disposed of industrial wastes.