The photo shows a street in Changsha, capital city of south China's Hunan Province, on March 26, 2012. Changsha Municipal Government plans to cover another 350 hectares of land with grass and trees in 2012, including 100 hectares of parklands. The city vowed to lower the level of airborne particulate matter smaller than 2.5 microns in diameter, otherwise known as PM 2.5 (XINHUA) |