![](http://images.china.cn/attachement/jpg/site1000/20150601/6c0b840a253016d63f5a15.jpg)
5月31日,美國加利福尼亞州洛杉磯被霧霾籠罩。新華社/法新
A view of the Los Angeles city skyline as heavy smog shrouds the city in California on May 31, 2015. AFP PHOTO/ MARK RALSTON
5月31日,美國加利福尼亞州洛杉磯被霧霾籠罩。新華社/法新
A view of the Los Angeles city skyline as heavy smog shrouds the city in California on May 31, 2015. AFP PHOTO/ MARK RALSTON