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  3. In the United States, the need to protect plant and animal species has become a highly controversial and sharply political issue

In the United States, the need to protect plant and animal species has become a highly controversial and sharply political issue

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问题     In the United States, the need to protect plant and animal species has become a highly controversial and sharply political issue since the passage of the Endangered Species Act in 1973. The act, designed to protect species’ living areas, and policies that preserve land and forests compete with economic interests. In the 1990’s, for example, the woodcutters in the Western United States were challenged legally in their attempt to cut trees for timber in the Cascade Mountains. The challenge was mounted to protect the endangered spotted owl(猫头鹰), whose remaining population occupies these forests and requires the intact, ancient forest for survival. The problematic situation set the interests of environmentalists against those of corporations and of individuals who stood to lose jobs. After months of debate and legal battles, the fate of the woodcutters--and the owls--was still undecided in mid-1992. Similar tensions exist between the developed and the developing nations. Many people in industrialized nations, for example, believe that developing nations in tropical regions should do more to protect their rainforests and other natural areas. But the developing countries may be impoverished(使穷困), with populations growing so rapidly that using the land is a means to temporarily avoid worsening poverty and starvation.
    Many of the changes to Earth that concern scientists ’have the potential to rob the planet of its biological richness. Global warming, for example, could wipe out species unable to quickly adapt to changing climates. Clearly, protecting Earth’s biological diversity is a complex problem. But solutions to humanity’s current problems will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earth’s complex web of life.
The author’s purpose in writing this passage is ______.
选项 A、to describe the difficulties in solving humanity’s current problems
B、to present the different views on humanity’s current problems
C、to analyze the contradiction between countries in dealing with humanity’s current problems
D、to point out that humanity’s current problems can only be solved through the cooperation of nations
答案D
解析 细节理解题。提出问题——分析问题——解决问题是四、六级经常出现的文章结构，所以该问题所设计的解决这一冲突的方法可以依据文章的最后一句“But solution to humanity’s current problems will come only through coordinated international efforts…”，选择项D符合题意。
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