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1. Environmental problems have become one of the most urgent problems of modern society. More and more people suffer from air and water pollution. Nature also suffers from land and nuclear pollution. The reasons for such environmental problems are numerous. Among them increasing number of cars in the streets, factory waste, millions of cut down trees, destroyed habitats of animals, contaminated rivers and seas. All these problems mainly arise due to human careless activities and gradually destroy our planet.

2. Our plants and factories waste materials into water and atmosphere and pollute the air we breathe. We all know about the holes in the sky and the greenhouse effect .Sunlight gives us heat. Some of the heat warms the atmosphere, during the last 100 years we have produced a huge amount of carbon dioxide. We produce carbon dioxide when we burn coal, oil, petrol gas and wood. People have burned huge areas of rain forest. It means there are fewer trees and more carbon dioxide. The hole in the ozone layer has become so large that it causes sunburn and skin cancer. Doctors say health problems in towns are increasing. Extinction is another serious problem which we should all worry about. The species of some animals are very rare today.

(Fortunately, there are many ways to suspend these problems.For example, if we start recycling paper and cardboard, we can save lots of trees. If we start using public transport more than private cars, we can have less air pollution.

If we are unable to learn to use the environment carefully and protect it from damage caused by mans activities, very soon well have no world to live in.)