Earth Hour 2012 - in pictures

Australia Power lines crossing in front of the Sydney Harbour bridge and city skyline Photograph: Tim Wimborne/Reuters China University students participate in a mini marathon during Earth Hour at the Great Wall of China north of Beijing Photograph: Vincent Thian/AP China The country's National Stadium, also known as the Bird's Nest, and the National Aquatics Center, also known as the Water Cube before and during Earth Hour Photograph: David Gray/Reuters Singapore The Marina Bay Sands hotel and ArtScience Museum as seen during Earth Hour Photograph: Matthew Lee/Reuters Malaysia The Petronas Twin Towers turned off the lights to mark Earth Hour in Kuala Lumpur Photograph: Lai Seng Sin/AP The Taipei 101 building stands with its lights off Photograph: MANDY CHENG/AFP/Getty Images Vietnam Students sing in front of an opera house before its lights are turned off in Hanoi Photograph: HOANG DINH NAM/AFP/Getty Images Indonesia Prambanan temple before and during Earth Hour outside Yogyakarta city, Central Java Photograph: DWI OBLO/REUTERS India People hold candles and solar powered lamps at a gathering to mark Earth Hour in Mumbai Photograph: PUNIT PARANJPE/AFP/Getty Images India The India Gate in New Delhi before and during Earth Hour Photograph: PARIVARTAN SHARMA/REUTERS Pakistan Participants light candles during a ceremony in Islamabad Photograph: Anjum Naveed/AP Russia People launch a Chinese paper wish lantern in Moscow Photograph: KIRILL KUDRYAVTSEV/AFP/Getty Images Greece The Acropolis in Athens with the lights on and off Photograph: LOUISA GOULIAMAKI/AFP/Getty Images Italy People posing for pictures in front of the leaning tower of Pisa and the cathedral on the Square of Miracles with the lights on and off Photograph: FABIO MUZZI/AFP/Getty Images Germany A volunteer lights one of 5000 blue and green candles in an eight-meter shape of the Earth in front of the Brandenburg Gate in Berlin Photograph: Adam Berry/Getty Images France Papier-mache pandas set up by members of the WWF are pictured in front of the Eiffel Tower in Paris Photograph: KENZO TRIBOUILLARD/AFP/Getty Images United Kingdom The lights are turned off in the Houses of Parliament to mark Earth Hour in London Photograph: Dan Kitwood/Getty Images