A college student lies in a feign scene of tree stumps and wasted papers during the launching ceremony of 2010 Earth Hour Changsha in Changsha, capital of central China's Hunan Province, March 21, 2010. Volunteers encouraged people here on Sunday to take part in Earth Hour 2010, which will be held on March 27 by switching off unnecessary lights for an hour from 8:30 PM to boost the global awareness of climate change. [Xinhua]

Three college students act as passengers on a bus during the launching ceremony of 2010 Earth Hour Changsha in Changsha, capital of central China's Hunan Province, March 21, 2010. [Xinhua]