The main pollution source of the hydrargyrum of vegetable and soil is the atmosphere dust of factory and gas in the Harbin's greenbelt.

哈尔滨市绿地土壤和植物的汞污染主要来源是工厂和交通尾气的大气降尘。

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The eruption has left a thin veil of dust in the upper atmosphere.

这次火山喷发在上层大气中留下了一个薄薄的尘土层。

《柯林斯英汉双解大词典》

Still others argue that volcanic dust injected into the atmosphere shields Earth from the Sun's rays and initiates an ice age.

还有人认为，注入大气的火山灰保护地球免受太阳辐射，并开启了一段冰河时代。

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Currently,the best explanation for the loss of methane is that it chemically reacts with dust in the atmosphere.

VOA: special.2009.12.30

Next year, NASA is to launch a demonstration mission to test optical laser communications in conjunction with the LADEE (Lunar Atmosphere and Dust Environment Explorer) mission to the moon.

FORBES: Future Of NASA's Aging Deep Space Network Lies In X-Rays And Lasers

The "Mona Lisa" experiment was transmitted at a slow data rate of about 300 bits per second, but the "pathfinding achievement sets the stage for ... high data rate laser-communication demonstrations that will be a central feature of NASA's next moon mission, the Lunar Atmosphere and Dust Environment Explorer, " said Goddard's Richard Vondrak, the orbiter's deputy project scientist.

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Much of north Europe's airspace was closed for more than a week in April 2010, as the volcano spewed dust into the atmosphere.

BBC: Ryanair plane taking off from Barcelona - file pic