Interfere, cause, contaminate, pollute, become, decompose, compound, accumulate, reach, pass, collect, graze, concentrate, eat, know

Example: to collect: a good deal of information, statistical data, dolls, Anna from school, yourself/your thoughts, etc

Exercise 13. Give definitions to the terms below:

Air, river and sea pollution, the greenhouse effect, the destruction of the ozone layer, destruction of the rainforests, waste disposal, overpopulation.

Exercise 14. Put as many questions to the sentences as you can.

Exhaust fumes are the main cause of bad air quality. 2. A brown layer of smoke hangs in the air. 3. The number of cars is increasing every year. 4. The greenhouse effect is caused by harmful gases. 5. Global warming may cause the ice in the North Pole and South Pole to melt.

Exercise 15. Match a line in A with a line in В to make a sentence. A В Acid rains try to persuade governments to take more care of the environment. Acid rain so that people can use the land to grow crops. Many people cause damage to trees, rivers, and buildings. Environmental groups can all be recycled. Wildlife is being threatened do not pollute the environment. Rainforests are being cut down have become extinct Many species of animal join environmental groups. Glass, cans, paper, and plastic because habitats and woodlands are being destroyed. Renewable energy sources contains acid from factory smoke.