Buildings are seen in the haze through a window in Beijing's central business district, July 9, 2013. Air pollution is shortening the lives of people in northern China by about 5.5 years compared to the south, a disastrous legacy of a policy that provided free coal for heating in the north, an international study shows.[Photo/Agencies]

A man prepares to dive into the Hanjiang River in Wuhan, Central China's Hubei province, July 9, 2013. [Photo/Xinhua]