(19) ______ pollution is a term that refers to all the ways by which man pollutes his surroundings. Man dirties (20) ______ air with exhaust gases and smoke, contaminates the water (21) ______ chemicals and other substances, and damages the soil with (22) ______ fertilisers and pesticides. Man also pollutes his surroundings in various other ways, (23) ______, people ruin natural beauty by scattering junk and litter on the land and in the water.
Environmental pollution is one of the most serious problems facing mankind today. Air, water, and soil are necessary to the survival of living things. Badly polluted air can cause illness, and even death. Polluted water kills fish and other marine life. Pollution of soil reduces the amount of land that is available for (24) ______ food. Environmental pollution also brings ugliness to man's natural beautiful world.
Question 19.