生物燃料专家认为目前美国的乙醇大部分是玉米制造而成，这很难减少温室气体的排放。
Biofuel critics say current us ethanol, which is mostly made from corn, does little to reduce greenhouse gas emissions.
不同来源的东西都具备生产生物柴油和可再生柴油的潜力，”明尼苏达大学的生物燃料专家道格拉斯·蒂凡尼说。
"You've got all these different sources and they all have they potential to be made into biodiesel or renewable diesel," said Douglas Tiffany, a biofuels expert at the University of Minnesota.
能源和野生动物专家们纷纷表达了对生物燃料的担忧，欧盟去年也似乎重新考虑了其立场。
Energy and wildlife experts have expressed concerns about biofuels and the EU last year appeared to reconsider its position.
开发生物燃料一直是人们的目标，而最近专家们的这项发现使它迈出了振奋人心的一大步。
Producing biofuels sustainably is now a target and this latest work has been greeted by experts as an encouraging step.
专家们表示，粮价上涨的部分原因是气候的变化，另一个原因是过去被用来种庄稼的农田现在被用来种植生产洁净的生物燃料的作物。
Experts say the rising food prices are partly due to climate change - and because fields once used to grow food crops are now used to cultivate crops for cleaner-burning biofuels.
对于环保专家杰西·奥索贝尔(JesseAusubel)来说，更倾向于采用土地保护和节能的绿色方法，抛弃诸如风车和生物燃料这类低能效的可再生资源。
For environmentalist Jesse Ausubel, going green means land conservation and energy efficiency-and forgetting "boutique" renewables like windmills and biofuels.
例如，欧洲环境署的专家小组建议大量使用生物燃料资源的最好办法不是用于交通燃料，而是用作民用取暖和发电。
For example, the European Environment Agency advisory panel suggests that the best use of plant biomass is not for transport fuel but to heat homes and generate electricity.
例如，欧洲环境署的专家小组建议大量使用生物燃料资源的最好办法不是用于交通燃料，而是用作民用取暖和发电。
For example, the European Environment Agency advisory panel suggests that the best use of plant biomass is not for transport fuel but to heat homes and generate electricity.
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