Ozone is one of the most harmful air pollutants.
臭氧是最具危害性的空气污染。
The Clean Air Act mandates the EPA to regulate harmful pollutants such as particulate matter and ozone.
《清洁空气法》授权美国环保局监管有害污染物，如微粒物质和臭氧。
And can lead to air pollutants is not easy to spread, enhanced the toxicity of harmful substances, serious, may also cause smog.
并且会导致空气中污染物不易扩散，增强有害物质的毒性，严重的，还可能会导致毒雾发生。
And can lead to air pollutants is not easy to spread, enhanced the toxicity of harmful substances, serious, may also cause smog.
并且会导致空气中污染物不易扩散，增强有害物质的毒性，严重的，还可能会导致毒雾发生。
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