#托业课堂#【空气污染源 Air Pollution Source】颗粒空气污染物（Particulate Pollutants）：细菌germ、微粒particulate、花粉pollen、烟尘soot、病毒virus。
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这种烹饪和取暖做法会造成高度室内空气污染，产生大量对健康有害的污染物，包括可渗透到肺部深处的烟尘微小颗粒。
Such cooking and heating produces high levels of indoor air pollution with a range of health-damaging pollutants, including small soot particles that penetrate deep into the lungs.
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。
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.
世界卫生组织的研究发现，空气污染物减少可以让颗粒物造成的死亡降低15%。
The WHO study finds a reduction in air pollutants could lessen deaths from particulate matter by 15 percent.
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