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The science of climate change is easy. We burn millions of tons of fossil fuels(矿物燃料) a year, sending millions of carbon dioxide
The science of climate change is easy. We burn millions of tons of fossil fuels(矿物燃料) a year, sending millions of carbon dioxide
admin
2013-10-30
42
问题
The science of climate change is easy. We burn millions of tons of fossil fuels(矿物燃料) a year, sending millions of carbon dioxide into the atmosphere. The gas acts like the windows of a greenhouse, retaining heat that would otherwise radiate(散发)away. Result: The world is warmer—half a degree or so in the past 100 years.
Think it doesn’t matter? Your grandchildren will disagree. In the near term, this warning contributes to accidental weather. More storms here; more drought (干旱) there. Over time, the disastrous consequences may include melted ice caps and higher sea levels. No more icebergs, No more Miami.
With 4 96 of the world population, the United States produces 22 % of all greenhouse gas. Clearly, we bear some responsibility. Which is why, combined with the threat to future Americans, the White House this week outlined a new plan to reduce greenhouse gas emissions(排放).
The plan is painfully modest. It delays hard limits for 10 years, hoping that tax incentives(激励措施)and pollution credits will spur(刺激)industries to act on their own. And the final goal--reduction to 1990 levels by about 2010—is lower than much desire.
选项
答案
carbon dioxide
解析
本题问的是什么造成了温室效应。从本文第一段第二、三句话中看到每年我们燃烧几百万吨的矿物燃料,并向大气中排放几百万吨的二氧化碳气体。这种气体就像温室的窗户防制热量散发出去。“the gas”根据语法和句意判断是指“carbon dioxide”。因此,答案应为carbon dioxide。
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大学英语三级A级题库大学英语三级分类
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