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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.
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 a collapse of the world economy
答案D
解析 文章第二段第二句话讲到“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．”虽然联合国气候变化研究小组发现：要想稳定大气中二氧化碳的含量，全球二氧化碳的排放量将不得不减少60％，但是，好几个理由显示这种做法不是切实可行的。如此大幅度的削减会引起世界经济的崩溃。可见D项最符合文章的意思，所以应该选D。
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