能源专家大多估计用玉蜀黍类乙醇替代汽油最多能抵美国汽油需求量的15%。
Most energy experts reckon that using maize-based ethanol as a substitute for petrol can reduce America's demand for petrol by 10-15% at best.
而如今开发树木作燃料的讨论与高科技密切相关，这就是从树木中提取乙醇，取代通常是从玉蜀黍（玉米）或蔗糖中提取的一种生物燃料。
But now the notion of exploiting trees for fuel is being updated with a high-tech twist. The idea is to make ethanol, a biofuel that usually comes from maize (corn) or sugar cane, from trees instead.
美丽的玉蜀黍在夏夜的荫下生长得最快。
The beautiful Indian corn never grows more rapidly than in the shadow of a warm summer night.
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