世界各地熄灯响应"地球一小时"

A combination photo shows The Bund on the banks of the Huangpu River before (top) and during Earth Hour (bottom) in Shanghai March 27, 2010. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. [Agencies]