An electronic board showing a slogan which reads, "improving air quality, everyone can act" is seen on Tiananmen Square on a hazy day in Beijing. Photo: Reuters
An electronic board showing a slogan which reads, "improving air quality, everyone can act" is seen on Tiananmen Square on a hazy day in Beijing. Photo: Reuters

Northern China cities face smoggy Christmas Eve

An electronic board showing a slogan which reads, "improving air quality, everyone can act" is seen on Tiananmen Square on a hazy day in Beijing. Photo: Reuters
An electronic board showing a slogan which reads, "improving air quality, everyone can act" is seen on Tiananmen Square on a hazy day in Beijing. Photo: Reuters
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