A woman walks along a pedestrian bridge near a chimney from a heating plant, on a heavy hazy day in Beijing, December 7, 2013. China will tighten restrictions on coal mining and roll out tougher ... more 
A woman walks along a pedestrian bridge near a chimney from a heating plant, on a heavy hazy day in Beijing, December 7, 2013. China will tighten restrictions on coal mining and roll out tougher measures to improve quality in a bid to reduce overcapacity and support prices in the sector, the country's economic planning agency said on Friday. REUTERS/Jason Lee (CHINA - Tags: ENVIRONMENT SOCIETY CITYSCAPE) less 
1 / 27
Reuters | Photo By JASON LEE / REUTERS
Sat, Dec 7, 2013 5:07 AM EST