The environmental objective of reducing auto emissions justifies the investment.

这样一来，减少汽车尾气排放的目标便得以实现。

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The EPA has been cracking down on auto emissions in an attempt to curb the smog in major cities.

环保署一直在治理汽车废气，力图控制大城市的烟雾危害。

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The brave new technology could drastically cut air pollution from auto emissions and other sources.

这种引入注目的新技术能极大地减少汽车尾气和其它原因造成的空气污染。

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The company thinks it can turn a profit by exploiting California's auto emissions program.

FORBES: Hot Air

To encourage the answer it wants--and to cut back the country's growing oil imports--Beijing has imposed taxes on high-gas-consumption autos, while adopting European auto emissions standards in 2004.

FORBES: Magazine Article

Wednesday's Supreme Court argument about whether to regulate carbon dioxide from auto emissions might have made you wonder why we don't just remove the greenhouse gas from auto exhaust the way we do a lot of other pollutants.

NPR: Has the Move to Make Cars Greener Stalled?