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。

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No matter what the situation, it is more harmful to compromise ones beliefs than to adhere to them.

无论在什么样的状况下，折衷本人的信仰要比坚持无害。

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No matter what the situation, it is more harmful to compromise one's beliefs than to adhere to them.

无论在什么样的情况下，折衷自己的信仰要比坚持有害。

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To that end, investigations on the state or congressional level into the harmful economic effects of perjury would help draw attention to the matter.

WSJ: Matthew Lifflander: The Economic Truth About Lying

Most of these deaths occur in developing countries where larger amounts of harmful chemical compounds such as toxic gases and particulate matter are released in the atmosphere.

UNESCO: 2015 For Women In Science Fellows

Everett Koop, the U.S. surgeon general who became a renowned conduit of information on the harmful effects of smoking, unwittingly provided a valuable lesson for negotiators: how to address subject matter most people consider negative and would prefer to not know about.

FORBES: What C. Everett Koop Can Teach Us about Negotiating