题目选项分析

Diesel engines burn as much as 30 percent less fuel than gasoline engines of comparable size, as well as emitting far less carbon dioxide gas and far fewer of the other gases that have been implicated in global warming.

Diesel engines burn as much as 30 percent less fuel than gasoline engines that have a comparable size, and also they emit far less carbon dioxide gas and other gases that have been implicated in global warming.