Severe Beijing smog prompts unusual transparency - Article Photos 5/6

A man wearing a mask walks on a stone bridge in a park on a hazy day in Beijing, China, Monday, Jan. 14, 2013. Beijing schools kept children indoors and hospitals saw a spike in respiratory cases Monday following a weekend of off-the charts pollution in China's smoggy capital, the worst since the government began being more open about air-quality data. (AP Photo/Alexander F. Yuan)