VOA慢速英语听力 ECONOMICS REPORT(WORD文本):1023A.doc
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- VOA慢速英语听力 ECONOMICS REPORTWORD文本:1023A VOA 慢速 英语听力 REPORT WORD 文本 1023
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1、高考资源网() 您身边的高考专家标题:voa慢速英语讲解附字幕:美国天然气勘探新观对应音频:1023a.mp3听力内容:In the US, the New Look of Gas ExplorationThis is the VOA Special English Economics Report.Many people think the search for cleaner energy leads only to renewable resources like sun, wind and water. But it also leads to a fossil fuel. Natur
2、al gas is considered the cleanest of the fossil fuels, the fuels created by plant and animal remains over millions of years.Burning it releases fewer pollutants than oil or coal. The gas is mainly methane. It produces half the carbon dioxide of other fossil fuels. So it may help cut the production o
3、f carbon gases linked to climate change.Russia is first in what are called proved reserves of natural gas. The United States is sixth. Over the years, big oil and gas companies recovered much of the easily reached supplies of gas in America. They drilled straight down into formations where gas colle
4、cts. As these supplies were used up, big drillers looked for similar formations in other countries.But now the industry is taking a new look. Companies are developing gas supplies trapped in shale rock two to three thousand meters underground. They drill down to the shale, then go sideways and injec
5、t high-pressure water, sand or other material into the rock.This causes the rock to break, or fracture, releasing the gas. Huge fields of gas shale are believed to lie under the Appalachian Mountains, Michigan and the south-central states.Gas shale exploration is being done mainly by small to medium
6、 sized companies.Eric Potter is a program director in the Bureau of Economic Geology at the University of Texas at Austin.ERIC POTTER: The types of opportunities that are left for natural gas exploration in the U.S. have changed. So its a different class of resource - not as easy to develop, and not
7、 even recognized as something worth pursuing, say, twenty years ago.He says more than half the gas in the United States is now coming from these new reserves.But hydraulic fracturing can also produce debate and anger over the risk of groundwater pollution. This method of drilling is not federally su
8、pervised under the Safe Drinking Water Act. Some in Congress want to end that exemption from the law.Natural gas provides Americans with about one-fourth of their energy. And, unlike oil, most of it is produced in America. Gas producers invested heavily in reaching new supplies when prices were high
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