Airborne dust is normally seen as an environmental problem, but the lack of it is making air pollution over China considerably worse.

虽然空气中的灰尘通常会被视为一个环境问题，但缺乏灰尘反而会对中国的空气污染造成相当严重的影响。

A new study suggests less dust means more solar radiation hits the land surface, which reduces wind speed. That lack of wind in turn leads to an accumulation of air pollution over heavily populated parts of China.

一项最新研究表明，较少的灰尘意味着更多的太阳辐射到达地面，这降低了风速。而风力不足会转而导致中国人口稠密地区空气污染的积聚。

The researchers found that reduced dust levels cause a 13% increase in human-made pollution in the region.

研究人员发现，由于空气中灰尘减少，导致人为因素引发的空气污染上升了13%。

Hundreds of millions of people across China continue to be impacted by air pollution from factories and coal-fired power plants. Studies suggest that the dirty air contributes to 1.6 million deaths a year, about 17% of all mortalities.

全国数以万计的人们将继续受到工厂和燃煤电厂所造成的空气污染的影响。研究指出，中国每年有160万人死于污浊空气引发的疾病，约占死亡人口总数的17%。

But this new research says that the human-induced pollution is being made worse or better by naturally occurring dust that blows in from the Gobi desert.

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