2. Tropical forests have supplied us with many sorts of plants for food, medicine, and industry.

3. Laws have been introduced to prohibit the killing of

endangered animals.

4. Deforestation is destroying large areas of tropical rain forest.

5. The area is roped off because the water is seriously polluted.

6. Dinosaurs became millions of years ago.

7. All national parks are in danger of ___________.

8. People are destroying the air by adding to it.

9. A child of a particular person or of an animal or plant.

10. Many species of rare animals are in _______ of becoming extinct.

11. The earth will be the happy planet where human beings, animals and plants __________ coexist.

12. People in this region cultivate mainly rice and vegetables.

13. The factory was fined for chemicals into the river.

14. We should participate in the movement to conserve the natural environment.

15. ____ aren’t effective anymore because insects have

become resistant to them.

16. To protect species, many countries have passed laws restricting hunting and fishing.