They would turn carbon dioxide from the atmosphere (or, better, from power-station exhaust) into petrol or diesel by photosynthesis.

他们可以将大气中(或者最好是发电站废气中)的二氧化碳通过光合作用转化成石油或者柴油。

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The exhaust from a coal-fired power station is around 10% carbon dioxide, however, whereas the level in the atmosphere is a mere 0.04%.

与大气中0.04%的CO 2 水平相比，一座燃煤电厂排放的废气中，二氧化碳的水平竟然达到10%左右。

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