一些分析人士担心排放标准将鼓励公司保持低库存水平，并进口更多的精炼燃料，从而导致美国提炼厂的产能过剩。

Some analysts worry that emissions standards would encourage companies to keep inventories low and to import more refined fuels, contributing to idle capacity in U.S. refineries.

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化石燃料产能同某些替代途径产能在成本上的差距已经很小，而且可能会继续缩短。

The cost differential between fossil-fuel-generated energy and some alternatives is already small, and is likely to come down.

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美国目前的拥有超过130亿加仑的“传统”乙醇生产能力，这占美国燃料消费总额的10%。

Presently the U.S. has the capability to produce over 13 billion gallons of "traditional" ethanol – which accounts for 10% of fuel used by American consumers.

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