Highest Warning In China Amid Severe Haze
Hazy weather hung over Beijing on Wednesday with conditions in other parts of north China possibly worsening, forecasters said, although cold air sweeping in from the northwest is expected to help dissipate the smog.
Experts attributed the haze in Beijing, which has lasted for several days, to poor atmospheric diffusion because of unseasonably weak cold air currents from the north.
Visibility in most parts of Beijing dropped to less than 500 metres (546 yards), the China Meteorological Administration said.