Telegraph: Beijing issued its first-ever red alert for smog on Monday, urging schools to close and invoking restrictions on factories and traffic that will keep half of the city's vehicles off the roads.
The red alert - the most serious warning on a four-tier system adopted a little over two years ago - means authorities have forecast more than three consecutive days of severe smog.
An online notice from the Beijing Municipal Environmental Protection Bureau said it issued the alert to "protect public...