By early 2008, Chen Hong had more than doubled his salary at this factory, which makes furniture for export to the U.S. Surrounding Guangdong province was suffering from a labor shortage so migrants like Chen could pick and choose where they worked. Frank Langfitt/NPR hide caption

itoggle caption Frank Langfitt/NPR

Workers in Shanghai walk on the roof of the Theme Pavilion, built for the World Expo 2010. The roof is covered with solar panels. China is striving to improve its energy efficiency and reduce surging demand for imported oil and gas by encouraging use of wind, solar and other clean sources. AP hide caption

itoggle caption AP