China's top steelmaking city of Tangshan, in the country's northern province of Hebei, on Thursday, issued an orange alert for pollution due to deteriorating weather conditions, according to a local government notice.

China: Top steel city Tangshan issues 'Orange smog' alert

Heavy smog envelops Beijing again

The Ministry of Environmental Protection warned in a statement that heavy air pollution will envelope Beijing, Tianjin, Hebei and the surrounding area from Friday until Jan. 17

China's capital issues first major smog alert of winter

smog-alert

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