First 'Orange' Pollution Alert as Smog Rolls into Beijing: The orange level, the second highest, advises schools and kindergartens to cancel outside sports classes, but falls short of ordering school to close and keeping government vehicles off the road, provisions which come into force with the "red" level.
Some residents welcomed the announcement. Others asked why more was not being done. "Excuse me, but do the PM2.5 measurements have to explode off the charts before we see a red alert?" said a user of weibo, China's twitter-like microblogging service.
China’s pollution hits critical stage
200,000 people die every year in China because of air pollution.
Beijing's Pollution Alarms Neighbors, environmental secrecy angers public and the world