Another factor driving up food prices is the controversial biofuels industry.

富有争议的生物燃料行业是粮食价格上涨的另一个因素。

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Transportation costs also are a major factor in food prices, especially for water-heavy vegetables such as romaine lettuce.

运输的价格是影响食品价格的一个重要因素，对于富含水的蔬菜，如直立莴苣，更是如此。

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But no matter how much we maximize crop yield per acre, the limiting factor for food production is land.

但是不管我们如何最大化粮食亩产量，最大的制约因素还是土地。

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The Midwest would become more self-sufficient in their energy production, an important factor for such an important food-producer.

FORBES: The Midwest Should Use Its Own Ethanol

Earlier this year, Pfizer, which is in the lead with an antibody trageting nerve growth factor one (NGF-1), announced that the Food and Drug Administration had told it to put clinical trials of its drug on hold.

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