They say part of the solution is to sharply cut use of fossil fuels 他们说大量减少使用化石燃料能部分解决这个问题。
2.
B20 and lower blends can be used in any diesel engine with no modifications B20和较低的混合燃料能用于不经改造的任何柴油机发动机。
3.
There are doubts about how green ethanol really is ( some say the production process uses almost as much energy as it produces ) 原因有好几个：一些人怀疑生物燃料到底是不是所谓的绿色能源，有人说生产过程中耗费的能源就已经跟这些产品燃料能产生的能量差不多了。
