我们必须得有风能、潮汐能、太阳能、天然气、混合燃料汽车还有所有那些。但我们也必须得有海底钻探，还有，我们得有核能。

We have to have wind, tide, solar, natural gas, flex fuel cars and all that but we also have to have offshore drilling and we also have to have nuclear power.

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所以采用天然气-柴油混合燃料可以更好地解决动力性下降这一矛盾。

So adopt the natural gas-diesel oil to solve this contradiction of the motive force decline better while mixing the fuel.

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公车比火车排放的碳更多，但通过使用混合燃料车或压缩天然气引擎可以减少至最低。

Buses emit more carbon than trains, but that can be minimized by using hybrid or compressed-natural-gas engines.

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