On 27 March 2010, in the cadre of Earth Hour organized by WWF, more than 3000 cities in 83 countries all around the world switched off the light for an hour.

At 20 30 local time the normally vibrant night view of Sydney went dark for an hour. Earth Hour, organized for the fourth time by the WWF, started in Sydney in 2007, when more than two million people turned their lights off to express their opinion about climate change. After just four years, the initiative has grown into a worldwide support for the green planet.

WWF (World Wide Fund for Nature), the world's largest and immensely respected, independent conservation organization, wants to raise the awareness towards the need to take action on climate change. This global phenomenon is seen as a vote for Earth and a livable future. "We think we are going to have 100 million people around sending message that climate change is real and we need to take action now", said WWF CEO Carter Roberts. Organizers also hope that their message will be taken seriously by the world leaders at the climate change summit in December in Copenhagen, Denmark.

With more than 3000 cities in 83 countries, this initiative seems to convince numerous people and companies that switched off their lights and other electric appliances for one hour. Landmarks like the Sydney Opera House, the Empire State Building, Big Ben, Egyptian Pyramids, the Eiffel Tower, the Acropolis, St. Peters Basilica or the Bird's Nest Sadiom and the Water Cube in Bejing are among the most well know participants this year. the widespread attention gave a good opportunity to some vigilants restaurants to organize candlelight dinners for their customers.

Earth Hour is a unique innitiative showing the hope for a better future and the force of unity and cooperation.

Earth Hour SlideShow: