Complete the sentences with the correct form of the appropriate word in the box erosion eliminated polluted disappearance circulation extinction pollution endangered destruction 1. The world’s rain forests must be safe from................ 2. Major steps are being taken to control the................of beaches. 3. ............ air makes people unpleasant to breathe. 4. Many species of plants and animals are in danger of.......... 5. The government has made no attempt to reduce soil................ 6. We are now facing the possible ............. of several rare species. 7. Trees, grasses, and other plant life play an important part in the natural................ of water. 8. The giant panda is an................species. 9. Many species of plants and animals have been .........