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）。
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。
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。
The most pressing issue is to reduce air pollution from particulates in diesel vehicle emissions, as this is a direct present threat to our health.
现在最迫切的工作是减少柴油车辆废气中的微粒，因为这会造成空气污染，直接危害市民的健康。
The most pressing issue is to reduce air pollution from particulates in diesel vehicle emissions, as this is a direct present threat to our health.
现在最迫切的工作是减少柴油车辆废气中的微粒，因为这会造成空气污染，直接危害市民的健康。
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