But the new cleaner fuel has come on stream just as regulators are clamping down on emissions of smog-causing nitrous oxides and soot-like particulates, which have been linked to lung cancer.

不过这种更干净的燃料一直没能投入生产，直到决策者们决定限制一氧化碳和灰尘微粒的排放量（它们是有害烟雾的主要来源，煤尘微粒则与肺癌有联系）。

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The "Keystone State" ranks 48th in CO2 emissions from fossil fuel combustion, 49th for particulates in the air, and 49th for toxic exposure.

拱心石之州在化石燃料燃烧产生CO2上排名48，可吸入颗粒排名49，毒素暴露位居49。

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The EPA tagged the county at the end of 2006, after pollution from particulates - known to experts as "fugitive dust" - exceeded the emissions standard for two years running.

环保署选中2006年底选中该镇，当地两年来微粒污染(专家称之为“浮沉”)超过了排放标准。

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Diesel exhaust emissions from lorries, which contain concentrations of particulates, are responsible for many of the 9, 000 deaths a year attributed to particulate emissions by the government's expert advisory body.

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Impurities are removed from the gas before it is burned, which results in lower emissions of sulfur dioxide, particulates and mercury.

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