5. The researchers argue that the greenhousegases emitted in making biofuel may well negate most of the carbondioxide savings made by replacing fossil fuels.
研究人员认为,在生产生物燃料过程中排放的温室气体很可能会抵消替换矿物燃料节省下来的大部分二氧化碳。
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6. The researchers argue that the greenhousegases emitted in making biofuel may well negate most of the carbondioxide savings made by replacing fossil fuels.