Bloomberg: Pollution in Beijing rose to nearly 10 times levels considered safe by the World Health Organization, triggering warnings to avoid outdoor activity.
The concentration of PM2.5 -- the small particles that pose the greatest risk to human health -- hit 242 in the Chinese capital as of 3 p.m., a U.S. Embassy monitor said. The WHO recommends 24-hour exposure to PM2.5 levels of less than 25.
High pollution levels prompted Premier Li Keqiang to say earlier this month the government would declare...