Corn-based ethanol is neither cheap nor especially green: it requires a lot of energy to produce.

用玉米制造乙醇既不便宜，也并非特别环保：需要耗费很多能量生产。

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His roots in a corn-growing state have dismayed opponents of America’s corn-based ethanol subsidies.

他与玉米生产大州的渊源已引发了反对美国补贴玉米乙醇者们的担忧。

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Corn plantings in America are expected to be at record levels this spring, due to the growing demand for corn-based ethanol biofuel.

由于对谷基乙醇生物燃料的需求不断增长，美国的谷物种植有望在今春达到最高水平。

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Corn-based ethanol produces only slightly more energy than it takes to produce it.

VOA: standard.2009.09.02

Even Al Gore now admits that corn-based ethanol produces more carbon dioxide than it saves.

FORBES: Global Warming And Global Food Security

Due to large government subsidies, the growth of corn-based ethanol has been nothing short of meteoric.

FORBES: Ethanol Isn't Worth Costlier Corn Flakes And Tortillas

Of this amount, 21 billion gallons must come from biofuels other than corn-based ethanol.

FORBES: Senate Passes Watered-Down Energy Bill