Two people on a motorbike wear masks while riding in heavy pollution in Shanting district, Zaozhuang city of East China's Shandong province, on Feb 27, 2013. Shanting district has been shrouded by the heavy pollution measuring 372 on the PM2.5 scale on Wednesday. The meteorological department reminded citizens to pay extra attention to travel safety. [Photo by Li Zongxian/Asianewsphoto]

Cracked land of a dried reservoir is seen in Shilin County of southwest China's Yunnan Province, Feb 27, 2013. [Lin Yiguang/Xinhua]