04/05/2022
Every year world industry pollutes the air that we breathe with. A great number of cities suffer from smog. Rainforests are cut down. Their disappearance upsets the oxygen balance. As a result, some rare species of animals, birds, fish and plants are extinct. A lot of seas, rivers and lakes are filled with poison like industrial and nuclear wastes, chemical fertilizers and pesticides. The pollution of air and the world's ocean, destruction of the ozone layer is the result of man's careless interaction with nature, a sign of the ecological crisis.