Fill in each numbered blank with one suitable word or phrase. Tropical forests are known to be very (Question 41) ____ to the balance of nature but we are destroying them at an incredible rate. They (Question 42) ___ not only to benefit the natives of that country, (Question 43) ___ to satisfy the needs of richer countries. Central American forests are being destroyed for pastureland to make pet food in the United States cheaper; in Papua New Guinea, forests are destroyed to (Question 44) __ cheaper cardboard packaging for Japanese electronic products; in Burma and Thailand, forests have been destroyed to (Question 45) ____ more attractive furniture in Singapore and Hong Kong. (Question 46) ____, a rich person living thousands of miles away may cause more tropical forest (Question 47) ____ than a poor person living in the forest. In short, it is everybody's duty to safeguard the future of mankind — through population control and being more aware of the (Question 48) ___ his actions have on nature. Nature is both fragile and powerful. It is very easily destroyed (Question 49) ____ man; on the (Question 50) _____ hand, it can go easily destroy human beings with terrible disasters. Question 41:
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