插电式混合动力汽车比单纯汽油动力汽车的废气排放量更少，尤其是当他们使用电源运行时，完全不会产生废气。

Plug-in electric hybrids give off less exhaust than gas guzzlers. And when they're running on battery power, they generate no fumes at all.

youdao

在碳处理工厂(CCS)，从废气中提取的二氧化碳，用汞输送到地表下面几公里外的含土水层和老汽油田。

In a carbon sequestration power plant (CCS), CO2 is extracted from the exhaust then pumped into aquifers and old gas fields several kilometres beneath the Earth's surface.

youdao

把乙醇掺入普通汽油之中，或者直接用在特殊的“乙醇燃料”引擎中，可以减低温室效应—废气排放。

And blending ethanol into ordinary petrol, or burning it directly in special "flex-fuel" engines, reduces greenhouse-gas emissions.

youdao

Clearly, if I did nothing more, but I took every car, doubled its fuel economy, its emissions would go to 50% of what they are now, no other changes being made.

显然，如果我什么也不做，但是我把没量车的汽油价加倍，汽车废气排放量就会是现在的一半了，别的不会有什么改变。

麻省理工公开课 - 固态化学导论课程节选