Therefore, the spread and use of heat energy meter has important practical and long-term significances in many aspects such as pollution control etc.

因此，热表的普及与使用对节约能源、控制污染等都具有深刻的现实意义和长远的战略意义。

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Our natural mineral salts from the thousand-meter deep Jurassic layer are pure, natural, free of pollution, and safe.

本公司的千米侏罗纪地质层天然矿盐，纯净、天然、无污染，安全自然。

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But by U.S. standards, Utah's pollution index is off the charts with readings routinely exceeding a scale that tops out at 70 micrograms a cubic meter.

NPR: Sickening Fog Settles Over Salt Lake City Area