1.Half the world’s rain forests have already been __________________ (destroy) 2. The storm has caused widespread __________________ in the countryside. (destroy) 3. Garbage __________________ causes pollution. (dispose) 4. The __________________ of crops on the same land can prevent soil exhaustion. (rotate) 5. We are now facing the possible __________________ of several rare species. (appear) 6. __________________ natural resources is of great importance. (preserve) 7. She is a biologist. She is interested in __________________ (conserve) 8. Burning garbage will give off __________________ odour. (pleasure) 9. These chemicals are _________. They can cause death or illness if taken into the body.(poison) 10. __________________ countries cause acid rain and green house effect. (Industry)