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  3. Next week the Environmental Protection Agency(EPA)is expected to announce new rules designed to limit global warming．Although we

Next week the Environmental Protection Agency(EPA)is expected to announce new rules designed to limit global warming．Although we

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问题 Next week the Environmental Protection Agency(EPA)is expected to announce new rules designed to limit global warming．Although we don’t know the details yet，anti-environmental groups are already predicting vast costs and economic doom．Don’t believe them．Everything we know sug．gests that we can achieve large reductions in greenhouse gas emissions at little cost to the economy．
    Just ask the United States Chamber of Commerce．That’s not the message the Chamber ofCommerce was trying to deliver in the report it put out Wednesday．It clearly meant to convey the impression that the EPA’s new rules would wreak havoc．But if you focus on the report’s content rather than its rhetoric，you discover that despite the chamber’s best efforts to spin things，the report almost surely overstates the real cost of climate protection—the numbers are remarkably small．
    Specifically，the report considers a carbon-reduction program that’s probably considerably more ambitious than we’re actually going to see，and it concludes that between now and 2030 the program would cost $50．2 billion in constant dollars per year．That’s supposed to sound like a big deal．Instead，if you know anything about the U．S．economy，it’s just not a lot of money．
    Remember，we have a $17 trillion economy right now，and it’s going to grow over time．So what the Chamber of Commerce is actually saying is that we can take dramatic steps on climatesteps that would transform international negotiations，setting the stage for global action while reducing our incomes by only one—fifth of 1 percent．That’s cheap!
    One more useful comparison：The Pentagon has warned that global warming and its consequences pose a significant threat to national security．(Republicans in the House responded with a legislative amendment that would forbid the military from even thinking about the issue．)Currently，we’re spending $600 billion a year on defense．Is it really extravagant to spend another 8 percent of that budget to reduce a serious threat?
    You might ask why the Chamber of Commerce is SO fiercely opposed to action against global warming，if the cost of action is so small．The answer，of course，is that the chamber is serving special interests，notably the coal industry--what’s good for America isn’t good for the Koch brothers，and vice versa—and also catering to the ever more powerful anti-science sentiments of the Republican Party．
    请回答下列问题。
The author mentions $50．2 billion and$17 trillion to indicate that____________．
选项 A、environmental protection costs too much
B、America has a large economic revenue
C、the nation has solid foundation to limit global warming
D、money is the only key factor of environmental protection
答案C
解析 推断题。根据题干关键词定位到第三、四段。第三段讲的是减碳计划的成本将达到每年．502亿美元，这让人觉得是大手笔。接着作者话锋一转，指出倘若读者对美国经济稍有了解，就不会觉得这是多大的数目了。第四段指出目前美国的经济规模为17万亿，而且还会继续增长，进而得出结论：美国可以采取激进的、可以彻底改变国际谈判格局的气候举措。因此，作者通过两个数据的对比是想说明，美国有雄厚的经济基础来实行减碳计划，故C项符合题意，为正确答案。A项是对成本数字的表面理解。B项具有一定的干扰作用，但其表述的只是其中一方面的情况，并未凸显与减碳计划的关系。D项属于过度推断，两个数字的对比并不能推出钱是环保的唯一关键因素。故本题选C。
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