If not vehicle and factory pollution then, as today, the problem is sandstorms as millions of tons of fine dust blanket the city, clogging the nostrils and silting up the lungs.

如果问题不是车辆和工厂污染，就像今天，那么就是沙尘暴，它如同数百万吨的粉尘覆盖了整座城市，侵入了人们的鼻孔和肺部。

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The essay introduces the theory of reuse of dust-removing wastewater of coal based boiler and its applied technique which has been test-running in Changde Cigarettes Factory for one year.

本文介绍燃煤锅炉除尘废水的循环利用原理、应用技术及其在常德卷烟厂进行生产性试验一年来的结果。

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The factory is equipped with dust-free purification production workshop, the introduction of advanced automatic production equipment.

工厂内配备无尘净化的生产车间，引进了先进的全自动生产设备。

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"Every night, the factory emits dust and smoke from those chimneys, " he says.

NPR: Concerns Rise with Water of Three Gorges Dam

Or, after the dust has settled on yet another human tragedy at a garment factory, will it be business as usual?

BBC: Dhaka factory collapse: Can clothes industry change?

Apple said it has established new requirements for firms dealing with combustible dust after the blast in Chengdu and an explosion at another supplier's factory in Shanghai that injured 59.

WSJ: Apple Details Working Conditions at Factories