Some critics have suggested that the production of corn ethanol uses up more fossil fuel energy than the biofuel energy it eventually produces.
一些批评人士指出，玉米乙醇的生产所消耗的化石燃料能源比它最终生产的生物燃料能源还要多。
It's interesting how everyone saw the biofuel industry as the answer to our energy problems, but in some ways, biofuels have created new problems.
有趣的是，每个人都把生物燃料工业看作是解决我们能源问题的答案；但在某些方面，生物燃料又产生了新的问题。
As a biofuel, ethanol is relatively easy to make, but it has a lower energy density than gasoline and can't be transported through existing pipelines designed for petroleum fuels.
乙醇作为一种生物燃料相对来说容易生产。但是与汽油相比它的能量密度较低，而且不能够通过现有的化石燃料管线来运输。
It was thus able to break down long carbohydrate chains to form small, useable molecules while simultaneously removing the oxygen and maintaining the energy content of the biofuel.
这样就能够打断碳水化合物长链来形成小而可用的分子，而同时将生物燃料中的氧移除并保持住其中的能量成分。
The researchers think they have devised a biofuel that has a 40% higher energy density than ethanol, that repels water and that can be made relatively speedily.
研究人员们认为设计出了一种比乙醇的能量密度高出40%的生物燃料，而且它排斥水并能在制造速度上相对快捷。
Alternative energy experts agree that photosynthesis is a promising avenue for biofuel research.
替代能源专家认为利用光合作用产能是一种很有前景的生物产能方式。
Adding 48 billion gallons of biofuel would cover the rest of transportation energy.
加入480亿加仑的生物燃料将用于其余的运输能量。
Since then, a European Union panel has approved new biofuel standards and the Food and Agriculture Organization of the United Nations called for more research into the energy source.
从那时起，欧盟专项小组，通过了新的生物燃料标准，同时美国食品和农业组织声称将投入更多研究于能源方面。
The resulting biofuel is not only energy-rich and water repellent but it also has a higher boiling point than ethanol.
最终的生物燃料不仅要是一种高能量的水不溶物，而且沸点也要高于乙醇。
Analysts are unsure if the Brazilian achievement can be replicated in Europe - or anywhere else. Sugar takes far less energy to convert to biofuel than almost any product.
分析家并不确定巴西的成就是否能在欧洲或其他任何地方复制。糖转换为生物燃料所需的能源比其他任何产品都少。
The researchers are planning a pilot program for an algae biofuel plant, in the hope of making really green energy.
研究人员正计划设立一个藻类生物燃料试点工厂，以期获得真正的绿色能源。
These and other grasses have been proposed as high-energy alternative feedstocks for biofuel production.
它们和其它几种草被看作生物燃料生产的高能替代原料。
But unlike some other kinds of new energy, biofuel is not clean, since burning it gives out lots of CO2.
但是生物燃料和其他新能源不同，生物燃料不是很清洁，因为它们燃烧时会释放二氧化碳。
Accelerating Biofuel Production to Meet the New Challenges, Yunquan Liu, Chevron Energy Technology Company.
加快生物燃油的生产，迎接新的挑战，刘运权，美国雪佛龙石油公司能源技术分公司。
Accelerating Biofuel Production to Meet the New Challenges, Yunquan Liu, Chevron Energy Technology Company.
加快生物燃油的生产，迎接新的挑战，刘运权，美国雪佛龙石油公司能源技术分公司。
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