Smog city

China Daily (Canada) - - FRONT PAGE -

Bei­jing is­sued a yel­low alert for smog on Thurs­day for the first time since Oc­to­ber, when the city in­sti­tuted the four-color warn­ing sys­tem, with red be­ing the high­est, fol­lowed by or­ange, yel­low and blue. City of­fi­cials ex­pect the smog will last for three days.

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