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World Wildlife Fund's (WWF) Earth Hour shows us how each of us can be heroes for our planet, our home.
The event that began in 2007 in Sydney now spans over 7000 cities worldwide, the event has turned into a global movement.
The legion of people that participate in the event made it the largest grassroots movement in 2010.
The video by WWF shows us how our actions today can change our tomorrow - and urges people to come together and to "Change Climate Change".
Another video by them shows a positive and hopeful future where the people's movement had a great impact and makes Planet Earth a better home for present and future generations.
Turn out your lights for just one hour at 8.30 pm.
Join the movement.
