In one month, dust fall can reach as much as 17kg per square kilometre.

在一个月的时间里，每平方公里差不多要落下17kg的灰尘。

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The mineral composition and morphology of atmospheric dust fall serve as important criteria in identifying pollution sources.

大气降尘矿物成分和形貌特征是判别污染物来源的重要标志。

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The geography information system (GIS) technology was applied to deal with the pollution state of atmospheric dust fall in Jiaozuo City of Henan Province.

应用地理信息系统(GIS)技术分析了焦作市城区大气降尘污染状况。

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Somehow the dust continues to fall: Met-Mex employees can be seen on vacuuming errands in many neighbourhoods of the city.

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She also has environmental allergies to molds, dust mites, certain fall pollens and certain trees.

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Radioactive isotopes accumulate in milk after they spread through the atmosphere, fall to earth in rain or dust, and settle on vegetation, where they are ingested by grazing cattle.

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