To create awareness about Environment damage the world is celebrating Earth Hour on March 23, 2013. Thereby it was announced by World Wildlife Fund for nature to switch off all the lights from 8.30pm to 9.30pm for one hour today.
Overall seven thousands cities are celebrating the Earth hour in the world. In India including Chennai in 150 states, awareness programme will be held .It was initiated by Sidney at 2007. Next to this, it was observed by many countries. Earth hour was celebrated to propagate environment awareness among the world.