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The government has shut schools, restricted road traffic and urged people to stay indoors as 24 cities across northeast China were put on “red alert” for extreme smog on Tuesday. 政府关闭了学校，限制了道路交通，并敦促人们留在室内。周二，华北24个城市发布了极端雾霾“红色警报”。 China's most severe bout of air pollution this year has hit 460m people, who are exposed to smog levels six times higher than the World Health Organisation’s daily guidelines, according to calculations by Greenpeace. The smog has lasted over three days in many areas. 根据绿色和平组织(Greenpeace)的计算，中国今年最严重的大气污染已影响了4.6亿人，污染程度是世界卫生组织(WHO)日常指标的六倍。在许多地区，雾霾天气已持续了三天。 | 
