7. If we continue to ________ the countryside, many more animals will become extinct. A. destroy B. dump C. fertilize D. pre

7. If we continue to ________ the countryside, many more animals will become extinct.
A. destroy B. dump C. fertilize D. preserve
8. Fossil fuels have caused irreversible _______ to the environment.
A. comsumption B. pollution C. damage D. preservation
11. The threat of global warming will eventually force the US to slow down its energy ___________.
A. conservation B. destruction C. vegetation D. consumption
12. Supermarkets have recognized the increasing popularity of _________ food.
A. organic B. inorganic C. gradual D. arid
13. The use of natural _________ can bring the crops on nicer than the use of chemical one.
A. waste B. fertilizer C. threat D. disposal
14. _________ ecosystems release only small quantities of nitrate in streams. (POLLUTE)
15. The long-term dangers of land _________ from irrigation and chemical fertilizers are growing. (DEGRADE)
19. He is an _________ with a passion of the biology and geography of the region. (ENVIRONMENT)