Which underlined part needs correcting?

Environmental pollution is a term that refers to all the (41) _____ by which man pollutes his surroundings. Man dirties the air with gases and smoke, (42) ______ the water with chemicals and other substances, and damages the soil with too many fertilizers and (43) _______. Man also pollutes his surroundings in various other ways. Environmental pollution is one of the most serious problems facing mankind today. Air, water, and soil are necessary to the survival of all living things. Badly polluted air can cause illness, and (44) _____death. Polluted water kills fish and other marine life. Pollution of soil (45) _______ the amount of land that is available for growing food. Environmental pollution also brings ugliness to man's naturally beautiful world.

(41) ____________

The committee ____________ of different people of different views.