They produce less pollution.

它们产生的污染更少。

youdao

Pollution—in general, recycling materials can produce less pollution, helping to keep our environment clean.

污染——一般来说，回收材料可以产生较少的污染，有助于保持我们的环境清洁。

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Many of the cars are models that burn less fuel and produce less pollution.

很多这类汽车都是节油型和环保型的。

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However,Tata company officials say the Nano will produce less pollution than any other car in the country.

VOA: special.2009.03.28

The group notes that old and new energy sources have both promise and risk for society and nature, since natural gas and wind energy produce less pollution than coal.

WSJ: Northeast drilling boom threatens forest wildlife

And that means that things like wind energy suddenly become more appealing because they don't produce those pollution -- those pollutants, and other sources of energy become less appealing because they do produce those pollutants.

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