Over 150 cities in India will be participating in the Earth Hour initiative on Saturday, March 23, to raise awareness about the problems of global warming and climate change. Across the world, a whopping 7,000 cities from over 150 countries are expected to shut down the lights for an hour tonight.

A World Wildlife Fund initiative, Earth Hour 2013 is meant to generate more awareness about climate change at a global scale. The Earth Hour event was initiated in 2007, when about 2.2 million people in Sydney, Australia turned off non-essential lighting as a symbol to raise awareness about global warming and climate change.

Famous landmarks across the world are also set to turn off the lights to mark the event – the Sydney Opera House, the Big Ben, the Empire State Building along with the Burj Khalifa will turn out their lights from 8:30 p.m. to 9:30 p.m.

Speaking about the hour long light off, Earth Hour’s executive director, Andy Ridley, in a blog said, “The hour itself is symbolic.”

“It signifies their concern for the future of this planet, but it doesn’t mean an hour-long lights off is the one action they are committed to,” he added.

So what will you do tonight? Will you be turning out the lights? Let’s give the earth a breather! Let’s pledge to conserve energy!