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  3. At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has become to work out int

At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has become to work out int

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问题     At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has become to work out international agreements relating to the environment because of economic concerns unique to each country. It is no longer enough to try to forbid certain activities or to reduce emissions of certain substances. The global challenges of the interlink between the environment and development increasingly bring us to the core of the economic life of states. During the late 1980s we were able, through international agreements, to make deep cuts in emissions harmful to the ozone layer. These reductions were made possible because substitutions had been found for many of the harmful chemicals and, more important, because the harmful substances could be replaced without negative effects on employment and the economies of states.
    Although the threat of global warming has been known to the world for decades and all countries and leaders agree that we need to deal with the problem, we also know that the effects of measures, especially harsh measures taken in some countries, would be nullified(抵消)if other countries do not control their emissions. Whereas the UN team on climate change has found that the emissions of carbon dioxide would have to be cut globally by 60% to stabilize the content of CO2 in the atmosphere, this path is not feasible for several reasons. Such deep cuts would cause a breakdown of the world economy. Important and populous(人口众多的)low-or medium-income countries are not yet willing to undertake legal commitments about their energy uses. In addition, the state of world technology would not yet permit us to make such a big leap.
    We must, however, find a solution to the threat of global warming early in the 21th century. Such a commitment would require a degree of shared vision and common responsibilities new to humanity. Success lies in the force of imagination, in imagining what would happen if we fail to act. Although many living in cold regions would welcome the global-warming effect of a warmer summer, few would cheer the arrival of the subsequent tropical diseases, especially where there had been none.
In the passage the author implies that______.
选项 A、it is always difficult to work out international agreements to cut down emissions harmful to the ozone layer
B、it is no longer easy to reach international agreements relating to the environment
C、the world has recently become aware of the threat of global warming
D、the problem of global warming has largely been solved
答案B
解析 文章开头第一句话就讲到，由于各个国家独特的经济因素，要制定出与环境有关的国际协议已经变得相当复杂。可见B项正确，各国间不容易达成与环境有关的国际协议。第一段中还讲到“During the late 1980s we ware able，through international agreements，to make deep cuts in emissions harmful to the ozone layer．”20世纪80年代后期，通过国际协议，我们能够大幅度削减对臭氧层有害的物质排放。可见A项不对。第二段讲到，尽管世人了解全球变暖的威胁已有几十年……显然C项也不对。第三段讲到，在21世纪早期，我们必须找到解决全球变暖威胁的办法。可见D项也不对，全球变暖的问题大部分并没有得到解决。因此本题的正确答案为B。
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