Ans.-Fresh air, fresh water, fresh fruit and vegetables are good for good health. These make our life happy and healthy. But people do not understand and they pollute environment. There are many reasons for the pollution. People have cut the forests to meet the demands of ever-increasing population and setting up various industries. Burning of petrol and the smoke emitted by the factories pollute the air. We breathe in with carbon monoxide and nitrogen oxides. The effinents let off in rivers by the factories cause water pollution. Most of us do not undestrand it. It is human being who is harming environment. Something should be done to contain the increasing environmental pollution.
