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  3. We are entering a period in which rapid population growth, the presence of deadly weapons, and dwindling resources will bring in

We are entering a period in which rapid population growth, the presence of deadly weapons, and dwindling resources will bring in

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问题    We are entering a period in which rapid population growth, the presence of deadly weapons, and dwindling resources will bring international tensions to dangerous levels for an extended period. Indeed,【C1】______seems no reason for these levels of danger to subside unless population equilibrium is【C2】______and some rough measure of fairness reached in the distribution of wealth among nations.【C3】______of adequate magnitude imply a willingness to redistribute income internationally on a more generous【C4】______than the advanced nations have evidenced within their own domains. The required increases in【C5】______in the backward regions would necessitate gigantic applications of energy merely to extract the【C6】______resources.
   It is uncertain whether the requisite energy-producing technology exists, and more serious, 【C7】______that its application would bring us to the threshold of an irreversible change in climate 【C8】______a consequence of the enormous addition of manmade heat to the atmosphere. It is this 【C9】______problem that poses the most demanding and difficult of the challenges. The existing【C10】______of industrial growth, with no allowance for increased industrialization to repair global poverty, hold 【C11】______the risk of entering the danger zone of climatic change in as【C12】______as three or four generations. If the trajectory is in fact pursued, industrial growth will【C13】______have to come to an immediate halt, for another generation or two along that【C14】______would literally consume human, perhaps all life. The terrifying outcome can be postponed only to the extent that the wastage of heat can be reduced,【C15】______that technologies that do not add to the atmospheric heat burden — for example, the use of solar energy — can be utilized.  
【C15】
选项 A、if
B、or
C、while
D、as
答案B
解析
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