Until recently, most of that ___51___has focused on the land ___52___of the planet, where pollution directly affects people in their dailylives. Now, however, we have begun to realize that marine (海洋的)pollution is ___53___important. According to S.

第二节

语篇选词填空

Thepollution of the earth’s soil and water has become an issue ofgreat concern. Until recently, most of that ___51___has focused on the land ___52___of the planet, where pollution directly affects people in their dailylives. Now, however, we have begun to realize that marine (海洋的)pollution is ___53___important. According to S.A. Patin, marine pollution is the conditionthat results when people introduce into the seas substances harmfulto life, health, resources, activities, or ___54___.

Marinepollution is far from new. For over a million years, people havethought of the sea as a ___55___place to throw their garbage. And it is true that the sea has a greatcapacity for absorbing organic wastes. Some of these wastes are eatendirectly by the larger fishes. Others quickly ___56___into a kind of organic soup that provides food to ___57___species of single-celled plant and animal life.

Ascivilizations grew, more different pollutants were dumped into theseas. Still, this pollution did not really threaten the marineenvironment. The seas seemed ___58___of coping with anything that people could throw at them. Thissituation changed, however, when suddenly factories began dumpingenormous quantities of materials into the seas. Especially in somecoastal areas near large cities, ocean pollution began to ___59___marine life. For the first time, the oceans began to fail in theirability to ____60____humanity’s waste.