它们产生的污染更少。
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。
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。
Green buildings like this aren't necessarily cost-efficient for the investor, but it does produce much less pollution than that caused by energy production through fossil fuels.
对投资者来说，像这样的绿色建筑不一定具有成本效益，但它产生的污染确实比通过化石燃料产生能源的过程少得多。
Even if organic farming does consume a little less energy and produce a little less pollution, that must be offset against lower yields and greater land use.
即便有机种植的确消耗更少能源，产生更少污染，但也会被低产以及使用更多耕地所抵消。
We've got to discover and produce cleaner renewable sources of energy that also produce less carbon pollution, which is threatening our climate.
我们必须发现和生产清洁可再生能源，我们要减少碳污染排放，因为这会威胁我们的气候。
We've got to discover and produce cleaner renewable sources of energy that also produce less carbon pollution, which is threatening our climate.
我们必须发现和生产清洁可再生能源，我们要减少碳污染排放，因为这会威胁我们的气候。
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