注：1. tension张力，冲突

　　2. 看到similar就说明第二段说的和第一段一样。

　　3. But转折是重点

　　Many of the changes to Earth that concern scientists have the potential to rob the planet of its biological richness. The destruction of Earths ozone layer , for example, could contribute to the general process of impoverishment by allowing ultra-violet rays to harm plants and animals. And global warming could wipe out species unable to quickly adapt to changing climates. Clearly, protecting will come only through coordinated international efforts to control human population, stabilize the composition of the atmosphere, and preserve intact Earths complex web life.

　　36.Why does the author say that the protection of endangered species is a highly controversial

　　issue?

　　A) Because people cant agree as to what species to protect.

　　B) Because it is difficult to find an effective way to protect such species.

　　C) Because it affects the interests of certain groups of people.

　　D) Because it is a major problem involving a series of legal procedures.

　　注：细节题。第一段economic interests

　　●表示绝对的词--出现在文章中，是非常重要的出题点;如果出现在选项中，很可能是不对的。

　　全无：non-nothing-never-seldom-absolutely-hardly-little-few-prevent-exclude-neither...nor

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