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。
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。
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。
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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