The planet Earth is only a tiny part of the universe, but it's the only place where human beings can live. People always polluted their surroundings. Pollution is any substance that creates unfavorable change or degradation to an individual, population, or ecosystem. But until now pollution was not such a serious problem. People lived in uncrowded rural areas and did not have pollution - causing machines. With the development of crowded industrial cities, which put huge amounts of pollutants into small areas, the problem has become more important. Today our planet is in serious danger. Acid rains, global warming, air and water pollution, and overpopulation are the problems that threaten human life on Earth. And there are some reasons of global pollution.
The first reason is industrial enterprises. The seas are in danger. They are filled with poison: industrial and nuclear waste, chemical fertilizers and pesticides. The Me
The second reason is peoples. Our forests are disappearing because they are cut down or burnt by peoples. If this trend continues one day we won't have enough oxygen to breathe. People build factories, which make chemical products and things, for instance air freshener, insect’s sprays. They use it in the big amount. People invent the cars. Year-by-year in the world people produce a lot of cars and people use them thinking that cars are very useful. In some ways it is right, but most of people don’t know that exhaust gases pollute the air. And people themselves breathe this dirty air that can threaten the health of human. For example in Cairo just breathing the air is dangerous - equivalent to smoking two packs of cigarettes a day. The same holds true for many Russian cites.
In conclusion, it worse to think that our lives are more important thing which we ruin by themselves. Fortunately, it's not too late to solve these problems. We
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