Earth Hour is a critical global event which is organized by World Wildlife Fund towards the end of March every year. The primary concern of earth hour is to unite people to protect the planet.
The event encourages people from across the globe to turn-off their non-essential lights and other electrical appliances for an hour so as to decrease the overall energy utilization in the world.
2007: Earth hour was initially observed by WWF in Sydney. As many as 2.2 million people switched-off their lights for an hour to show support for the cause.
2008: Earth Hour became a global movement, in which more than 50 million people across 35 countries participated. Prominient landmarks including Golden Gate Bridge in San Francisco, Rome's Colosseum and the Coca Cola billboard in Times Square stood in darkness showing support for the cause.
2009: Marking the movement as the World's largest global climate change initiative, over 4000 cities in 88 nations pledged their support to the planet.
2010: Fourth Earth Hour succeeded in being a global call to stand and take responsibility for a sustainable future. Over 128 countries participated and famous buildings and landmarks from Asia Pacific, Europe, Africa and America, stood in darkness.
2011: This was the first time when Earth Hour requested people to go beyond the hour and to consider what else could be done to make a difference in reducing the pressure from our planet.
Last year, Earth Hour was honoured by more than 135 nations, with people uniting against an unnatural weather change.
This initiative is expected to garner greater support this year.
Ahead of its observance, WWF released a video that conveys how our actions today can change our tomorrow.
If you haven't seen the video, watch it here..