On March 28, lights around the world will be turned off as over 2,700 cities representing 83 countries celebrate EARTH HOUR 2009. It is estimated that over 1 billion people worldwide will participate in this global initiative organized by World Wildlife Fund International. That evening, from 8 pm to 9 pm, homes and businesses around the world, including TREB, will turn out their lights in a symbolic gesture to combat climate change.