The world is producing millions of tons of domestic rubbish and toxic industrial waste each year. It is becoming increasingly difficult to find suitable locations to get rid of all the refuse. The disposal of various kinds of waste is seriously polluting the environment. We know that air is an important element of our environment and our air is polluted by smoke. Man makes fires to cook food, make bricks, meal tar for road construction and to do many other things. Fires create smoke and pollute the air. Railway engines and powerhouses create smoke by buring coal and oil. Mills and factories also belch a lot of smoke. Buses, trucks and care use petrol and diesel oil. Mills and factories also belch a lot of smoke. Buses, trucks and cars use petrol and diesel oil. These too emit smoke. All these kinds of smoke pollute the air.
Water, another vital element of the environment, is also polluted in different way. Man pollutes water by throwing waste into it. Farmers use chemical fertilizers and insecticides in their fields. When rain and floods wash away some of these chemicals, they get mixed with water in rivers, canals and ponds. Mills and factories also throw their poisonous chemicals and waste products into rivers, canals and thus pollute water. Water vehicles also pollute rivers by dumping oil, food waste and human waste into them. Insanitary latrines and unsafe drains standing on river and canal banks are also responsible for further pollution. Thus, water is contaminated by various kinds of waste and filth.
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