Purple haze: lilac sky at night highlights China’s smog blight
by Tom Phillips in Beijing from on (#YHVG)
Images showing Nanjing city shrouded in a violet fug - said to be caused by a pollution spike at sunset - follow two red alerts for Beijing over toxic air
Photographs appearing to show one of China's most famous cities shrouded in a spectacular violet mist went viral on Wednesday, as millions of citizens choked on the country's latest bout of toxic smog.
The fluorescent purple haze that engulfed Nanjing - reportedly the result of a pollution-tinged sunset - was at one point the second most talked-about topic on Weibo, China's answer to Twitter.
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