V. Complete the sentences. Pollution, earth, health, poisoned, filters, important, survive, environment, waste. The word 1 … means simply what is around us. Nowadays people understand how 2 … it is to solve the environmental problems that endanger people`s lives. There is no ocean or sea which is not used as a dump. Many rivers are 3 … too. Fish can`t live in them. It happens so because factories and plants produce a lot of 4 … and pour it into rivers. Air 5 … is a very serious problem. To make air clean again we need good 6 … at power stations and factories, in cars and buses. Both clean air and clean water are necessary for our 7 …. If people want to 8 … they must solve these problems quickly. Man is beginning to understand that his environment is not just his own town or country, but the whole 9 …. That`s why people all over the world think and speak so much about ecology.

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