species, forests, amount, carbon dioxide, greenhouse, heating effect, warming, environment, effect, smog, pollute, halocarbone, riches, nature.

1. … effect the atmosphere is in warming the Earth’s surface.

2. The … of … in the atmosphere has been increasing by 0.4 % a year.

3. This … is the basic theory concerning global…

4. There are many gases in the atmosphere: methane, …

5. Crop production, sea levels depend on greenhouse …

6. People lived in harmony with … for thousands of years.

7. Many people think that natural … are unlimited.

8. Smoky enterprises … air.

9. A lot of cities suffer from …

10. Beautiful old … disappeared forever.

11. Some rare … of animals and birds disappeared forever.

12. The protection of … is a universal problem

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