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In face of global warming, much effort has been focused on reducing greenhouse gas emissions through a variety of strategies. Bu
In face of global warming, much effort has been focused on reducing greenhouse gas emissions through a variety of strategies. Bu
admin
2012-07-21
43
问题
In face of global warming, much effort has been focused on reducing greenhouse gas emissions through a variety of strategies. But while much of the research and innovation has concentrated on finding less-polluting energy alternatives, it may be decades before clean technologies like wind and solar meet a significant portion of our energy needs.
In the meantime, the amount of CO
2
in the air is rapidly approaching the limits proposed by the Intergovernmental Panel on Climate Change(IPCC). "As long as we’re consuming fossil fuels, we’re putting out CO
2
," says Klaus Lackner, a geophysicist at Columbia University. "We cannot let the CO
2
in the atmosphere rise indefinitely. "
That sense of urgency has increased interest in capturing and storing CO
2
, which the IPCC says could provide the more than 50% reduction in emissions thought needed to reduce global warming. "We see the potential for capture and storage to play an integral role in reducing emissions, "says Kim Corley, Shell’s senior advisor of CO
2
and environmental affairs. That forward thinking strategy is gaining support. The U.S. Department of Energy recently proposed putting $1 billion into a new $2.4 billion coal-burning energy plant. The plant’s carbon-capture technologies would serve as a pilot project for other new coal-burning plants.
But what do you do with the gas once you’ve captured it? One option is to put it to new uses. Dakota Gasification of North Dakota captures CO
2
at a plant that converts coal into synthetic natural gas. It then ships the gas 200 miles by pipeline to Canada, where it is pumped underground in oil recovery operations. In the Netherlands, Shell delivers CO
2
to farmers who pipe it into their greenhouses, increasing their yield of fruits and vegetables.
However, scientists say that the scale of CO
2
emissions will require vast amounts of long-term storage. Some propose storing the CO
2
in coal mines or liquid storage in the ocean. Shell favors storing CO
2
in deep geological structures such as saline (盐的) formations and exhausted oil and gas fields that exist throughout the world.
Through using CO
2
, Dutch farmers have been able to______.
选项
答案
Increase their yield of fruits and vegetables
解析
由题干关键词Dutch farmers将本题出处定位于原文第4段最后一句。increasing their yield of fruits and vegetables正是Dutch farmers使用二氧化碳的结果,注意试题中的不定式符号to,填入原形动词。
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0
大学英语六级
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