The new study comes from the Earth Policy Institute (EPI), a Washington-based environmental group.

这项新研究是以华府为根据地的环保团体“地球政策研究所”所做。

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But Lester Brown at the Earth Policy Institute in Washington says demand for fuel crops is pushing up food prices.

但华盛顿地球政策研究所的勒斯特·布朗说对燃料作物的需求会促使粮食价格上涨。

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According to the Earth Policy Institute, about 1.5m barrels of oil - enough to power 100,000 cars for a year - is used just to make the plastic.

据地球政策研究所称，仅生产瓶装水瓶所用的塑料就需要用去大约150万桶石油，足够给10万辆汽车提供一年的动力。

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Les Brown, the president of the Earth Policy Institute, points to studies that coal emissions, including mercury and other pollutants, cause more than 10, 000 deaths a year.

CNN: The war over coal is personal

The obsession with grain self-sufficiency is a holdover from Maoism that is encouraged by enviro-scaremongers such as the Earth Policy Institute's Lester Brown, who warns that China must prepare for food shortages.

WSJ: Review & Outlook: China's Toxic Rice Bowl

Lester Brown and his team at Earth Policy Institute have we believe correctly identified the weakest link in global economics with respect to climate: food security.

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