For the moment, technological advances are supporting ethanol and biodiesel's place in the global fuel mix.

眼下，科技进步为乙醇和生物柴油在全球燃料结构中的地位提供了支持。

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The country aims to raise the contribution of natural gas to the fuel mix to 10% by 2020 from less than 5% today.

中国的目标是到2020年让天然气在该国使用的各种能源中的占比从目前不到5%上升至10%。

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For one thing, utilities mostly have spare capacity and can thus adjust their fuel mix in a way that car drivers confronted with an oil shortage cannot.

一方面，公共事业团体大多有富余的燃料，所以他们能（在缺少天然气的条件下）调整自己的燃料组合，但司机却不能在缺油的情形下自我调节。

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The fuel mix and associated carbon intensity of most sectors have tended to be very stable over time.

FORBES: Energy-Related CO2 Emissions Take Nosedive In U.S.

It wants to make ethanol and other biocomponents or biodiesels a major component of the fuel mix going forward.

NPR: Would More Biofuel Use Threaten Food Supplies?

Freeman was a director and Nelson promoted Earth's "Bio-Willie" ethanol fuel mix.

FORBES: Magazine Article