In 1998, energy consumption in the transport sector was to blame for 28% of emissions of CO2, the leading greenhouse gas.
1998年，运输业的能源消耗导致了28%的二氧化碳排放，而二氧化碳是主要的温室气体。
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As to the cost, a reportpublished last year by MIT reckons on $25 a tonne to capture CO2 and pressuriseit into a superfluid, and $5 a tonne to transport it to its burial site.