Hazardous smog blanketing China's north-east sparks more red alerts, with authorities advising residents in 10 cities to stay indoors.
Beijing authorities have issued a second pollution "red alert", little more than a week after its first ever such warning.
Schools in Beijing are closed and outdoor construction halted as the Chinese capital's first ever pollution "red alert"red alert" came into effect.
Hazardous smog blanketing China's north-east sparks more red alerts, with authorities advising residents in 10 cities to stay indoors.
Beijing authorities have issued a second pollution "red alert", little more than a week after its first ever such warning.
Schools in Beijing are closed and outdoor construction halted as the Chinese capital's first ever pollution "red alert"red alert" came into effect.
