10 form "Ecology" : Ex.4, p.161 + Ex.8, p.162 -163

1. For thousands of years people lived in harmony with the environment.

But with the development of civilisation man's interference in animal habitats began to increase.

Major sourses of uncontrolled emission of different harmful substances are coal industries, metallurgical and chemical plants and power plants.

They (plants) improve the air we breathe, the water we drink, the land we live on.

The biggest polluter is the agriculture because of pesticides.

In order to solve ecological problems we must take care of nature and combine our efforts.

There are a lot of different species of animals on our continent.

Bees aren't so important as other insects.

Bees pollinate plants which are important for our life.

Though modern farming has changed their habitat and pollen is poisonous, bees aren't in danger.

If bees disappear, our life will be in danger.