He points out that using ethanol in place of oil reduces totalcarbondioxide emissions by only 13 per cent.
他指出，利用燃料乙醇来替代石油仅仅减少了13%的二氧化碳排放。
2
Another major concern is the environmental impact of transport, which accounts for roughly 25% of totalcarbondioxide emissions.
另一个主要问题就是交通对环境的影响，这约占总二氧化碳排放量的25%。
3
The totalcarbondioxide concentration increases from the surface layer to the bottom layer, and from the shelf break area to the near shore and to the outside sea.