The word environment means simply what is around us. Environment means air, war, land in which people, iwls and plants live. Ecology means natural ＿alaw between plants, animals, people and their environment.

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The most serious ecological problems are pollution in its many forms; noise from buses, planes; destruction of wildlife and the beauty of the countryside; shortage of natural ; the growth of populusion

Water pollution is very dangerous: seas and oceans are used as a This poisons water. A lot of waste from factories and plants goes into .rivers and lakes. If people drink such water, they can die. Fish, reptilea and birds cannot survive in poisoned water.

Air pollution is another serious problem Most of the pollution in big comes from cars and buses. Many scientists think that ozone holes are the result of air pollution. Air pollution can cause tin tuc