Recycling or reusing these devices conserves materials, prevents air and water pollution, and reduces greenhouse gas emissions that occur during manufacturing and processing.

回收或重用这些设备能够节省材料，阻止空气和水污染。 降低制造时产生的温室气体的排放。

youdao

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

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。

youdao

Burning ethanol reduces greenhouse gas emissions, since you're just putting carbon back into the atmosphere that was recently pulled out by the plants.

NPR: Canadian Dreams of Ethanol Distilled from Grass

Their increased capacity reduces collection trips, fuel costs and greenhouse gas emissions by 80%.

BBC: Dundee University to trial solar-powered bins