WMO scientists assess and monitor air pollutants such as ground-level ozone, smog, particulate matter, sulfur dioxide and carbon monoxide.

世界气象组织的科学家对地面臭氧、烟雾、空气悬浮微粒子、二氧化硫、一氧化碳之类的污染物质进行评估监测。

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The effect of sulfur oxides could be anticipated from the earlier experience in the acute smog episodes described above and from the studies in Great Britain and Japan.

硫氧化物的效应可根据上述早期的急性烟雾事件以及英国和日本的研究进行预测。

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WMO scientists assess and monitor air pollutants such as ground-level ozone,smog, particulate matter, sulfur dioxide and carbon monoxide.

VOA: standard.2009.03.23

After speaking with a few experts, it seems clear what needs to be done: China has to reduce its reliance on coal, increase renewable energy, regulate the amount of smog-causing sulfur that can go into its diesel fuel and increase vehicle efficiency.

CNN: China needs smog-free air in a can

Sulfur dioxide forms lung-damaging soot and smog, and has been linked to an array of respiratory problems.

WSJ: Settlement binds power co. to stop burning coal