Perhaps inspired by the nuclear-fallout shelters of the ‘50s and ‘60s, Bill Bounds stands at the entrance to his underground smog-alert chamber in the L.A. suburb of Manhattan Beach in 1971.

或许是受到了1950、60年代的核微粒遮蔽所的启发，比尔·庞斯（Bill Bounds）站在他在曼哈顿海滩洛杉矶郊区自建的烟雾报警室的入口。 时间为1971年。

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The Airparif monitoring agency said smog density was still near alert levels Monday, but rain forecast for Tuesday was expected to clear the air.

空气监测机构表示，周一雾霾浓度仍然处于警戒水平，但是预计周二的降雨能够净化空气。

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A smog-shrouded Chinese city canceled airline flights Sunday due to poor visibility and parents took children to hospitals on the second day of a pollution alert across the country's north.

周日，雾霾笼罩下的中国城市由于能见度低而取消了飞机航班，北方城市污染预警的第二天有很多家长带孩子去医院。

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Citizens of metro Atlanta experienced their first "code red smog alert" since 2010, according to the Clean Air Campaign, a partnership between employers and the state transportation department.

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There's a smog alert.

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Smog also spread across central and eastern regions as a yellow haze alert was issued yesterday, and "heavy to severely heavy pollution" was recorded in Beijing, China Daily reports.

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