Studying the environmental effects of toxic air pollutants is currently very important in the world.

有毒有害空气污染物的环境影响是国内外研究的热点，而机动车排放是其重要源之一。

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Although the source and chemistry of air pollutants affecting the brain differ, all seem to share the same toxic modus operandi: inflammation.

尽管各种空气污染物的来源和化学机制不同，但似乎感染方式相似：炎症感染。

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There are pollutants in the air conditioning, toxic particles, dangerous bacteria and mold all flying around, especially in buildings that aren't well taken care of.

在空调里会有很多的污染物。在清洁不到位的办公大楼里更会有各种有毒颗粒、有害细菌到处乱飘。

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The EPA rule stirring the most anxiety will be proposed this week: It seeks to reduce emissions of toxic air pollutants, including mercury, which can cause neurological disorders in children.

WSJ: EPA Tangles With New Critic: Labor