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SSS 2009-03-16

时间:2010-05-17 06:33来源:互联网 提供网友:木渐浅。   字体: [ ]
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This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute.

 On March 11th, Interior Secretary Ken1 Salazar called for a “moonshot for energy independence.” He’s set up a task force to look into the large-scale production of solar, wind and geothermal energies. But he didn’t say anything about wood. That’s right: Wood. In the March 13th issue of Science, researchers in the U.S. and in Austria tout3 wood as a neglected but potentially useful source of energy.

Americans relied on wood for the bulk of their energy until the 1800s, when we fell head over heels for coal. Now in Europe, many countries are turning back to trees, and to advanced wood combustion4 technologies to supply heat, cooling and power to their communities. Austria alone has built more than 1,000 wood-burning plants that emit remarkably5 few pollutants6, and have thermal2 efficiencies approaching 90 percent.

If chopping down forests for fuel doesn’t sound like the greenest solution to our energy needs, the scientists note that we’d have to figure out how to manage our woodsheds sustainably, to avoid slashing7 and burning our way to a toasty home and a bare Earth. But trees are renewable. They’re cheaper than fossil fuels. And they provide more shade than offshore8 windmills.

 

Thanks for the minute for Scientific American's 60-Second Science. I'm Karen Hopkin.

 


点击收听单词发音收听单词发音  

1 ken k3WxV     
n.视野,知识领域
参考例句:
  • Such things are beyond my ken.我可不懂这些事。
  • Abstract words are beyond the ken of children.抽象的言辞超出小孩所理解的范围.
2 thermal 8Guyc     
adj.热的,由热造成的;保暖的
参考例句:
  • They will build another thermal power station.他们要另外建一座热能发电站。
  • Volcanic activity has created thermal springs and boiling mud pools.火山活动产生了温泉和沸腾的泥浆池。
3 tout iG7yL     
v.推销,招徕;兜售;吹捧,劝诱
参考例句:
  • They say it will let them tout progress in the war.他们称这将有助于鼓吹他们在战争中的成果。
  • If your case studies just tout results,don't bother requiring registration to view them.如果你的案例研究只是吹捧结果,就别烦扰别人来注册访问了。
4 combustion 4qKzS     
n.燃烧;氧化;骚动
参考例句:
  • We might be tempted to think of combustion.我们也许会联想到氧化。
  • The smoke formed by their combustion is negligible.由它燃烧所生成的烟是可忽略的。
5 remarkably EkPzTW     
ad.不同寻常地,相当地
参考例句:
  • I thought she was remarkably restrained in the circumstances. 我认为她在那种情况下非常克制。
  • He made a remarkably swift recovery. 他康复得相当快。
6 pollutants 694861490fe64672170a0da250a277c7     
污染物质(尤指工业废物)( pollutant的名词复数 )
参考例句:
  • Pollutants are constantly being released into the atmosphere. 污染物质正在不断地被排放到大气中去。
  • The 1987 Amendments limit 301(g) discharges to a few well-studied nonconventional pollutants. 1987年的修正案把第301条(g)的普通排放限制施加在一些认真研究过的几种非常规污染物上。 来自英汉非文学 - 环境法 - 环境法
7 slashing dfc956bca8fba6bcb04372bf8fc09010     
adj.尖锐的;苛刻的;鲜明的;乱砍的v.挥砍( slash的现在分词 );鞭打;割破;削减
参考例句:
  • Slashing is the first process in which liquid treatment is involved. 浆纱是液处理的第一过程。 来自辞典例句
  • He stopped slashing his horse. 他住了手,不去鞭打他的马了。 来自辞典例句
8 offshore FIux8     
adj.海面的,吹向海面的;adv.向海面
参考例句:
  • A big program of oil exploration has begun offshore.一个大规模的石油勘探计划正在近海展开。
  • A gentle current carried them slowly offshore.和缓的潮流慢慢地把他们带离了海岸。
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TAG标签:   SSS  combustion
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