In principle this gives the agency wide authority to create new rules curbing the carbon emissions of cars and factories.

原则上来说，这规定给了该署很广泛的权力，可以颁布新的规定来约束汽车和工厂的排放量。

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During emissions testing, the cars' pollution controls systems were turned on, curbing toxic emissions at the cost of engine performance.

在排放检测中，车辆的污染控制系统会被打开，遏制发动机性能，削减有毒物质的排放。

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In principle this gives the agency wide authority to create new rules curbing the carbon emissions of cars and factories.

ECONOMIST: America's democracy