周六熄灯一小时 (水城百事)

by cbc, Thursday, March 25, 2010, 16:30

Earth hour is a one hour event held across the world to raise awareness on energy consumption and its impacts on our environment and climate change. For one hour on Saturday March 27 2010 cities around the world are asked to turn off all lights and electrical equipment between 8:30pm and 9:30 pm.