2. 外语
  3. Global Warming At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has b

Global Warming At the Kyoto conference on global warming in December 1997, it became abundantly clear how complex it has b

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问题                                          Global Warming
      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 others 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 21st century. Such a commitment would require a degree of shared vision and common responsibilities new to humanity. Success lies in the force of imaginations, 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 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 had recently become aware of the threat of global warming
D、the problem of global warming has largely been solved
答案B
解析 文章的作者暗示：A 要达成国际协议来减少危害臭氧层的物质排放量，一直是一件困难的事情；B达成有关环境的国际协议已不再是一件容易的事情；C 全世界最近才意识到全球变暖的威胁；D 全球变暖问题已在很大程度上得以解决。
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