They recommend revised limits for the concentration of selected air pollutants: particulate matter (PM), ozone (O3), nitrogen dioxide (NO2) and sulfur dioxide (SO2), applicable across all WHO regions.

它们为下述选定的空气污染物的浓度限值提出了修订：可吸入颗粒物(PM)、臭氧(o3)、二氧化氮(NO2)和二氧化硫(SO2)，适用于世卫组织所有区域。

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Biomass pellet machine solid fuel low ash low sulfur, nitrogen oxides, sulfur dioxide, carbon dioxide and soot particle emissions is far less than coal-fired power generation.

生物质颗粒机固体燃料低灰低硫，氮氧化物、二氧化硫、二氧化碳以及烟尘颗粒的排放远低于燃煤发电。

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They are mostly sulfur dioxide and nitrogen dioxide from power plants, auto exhausts and industry.

这些颗粒物大多为发电厂、汽车工业和汽车尾气排出的二氧化硫和二氧化氮。

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The process that smokestack "scrubbers" use to reduce nitrogen oxide and sulfur dioxide emissions creates high-quality synthetic gypsum, said Robert E.

CNN: Turning toxic coal ash into bridges, buildings

Ertel was soon a big producer at Natsource, trading sulfur dioxide, nitrogen oxide, carbon and even weather derivatives.

FORBES: Selling the Blue Sky

"The marble and sandstone were being weathered by atmospheric fumes, including sulfur dioxide and nitrogen oxides, " Gopalakrashne says.

CNN: Air pollution kills, but deaths can be prevented