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  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.  
According to the author, it is impossible at present to cut 60% of carbon dioxide emissions globally because______.
选项 A、it is only a goal to be reached in the future
B、some people are lacking in imagination
C、some people are irresponsible
D、it would cause to a collapse of the world economy
答案D
解析 作者认为目前不能在全球范围内减少60%的二氧化碳释放量的原因是：A 这仅是未来要实现的目标；B 某些人缺乏想像力；C 有些人不负责任；D 这将引起世界经济崩溃。
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