The Houses of Parliament in London are seen before Earth Hour...
and while the lights were switched off for one hour to mark Earth Hour 2010
The Eiffel Tower in Paris before and during Earth Hour
The Empire State Building is pictured before Earth Hour in New York...
...and during Earth Hour
Luna Park in Sydney
The Las Vegas Strip seen before Earth Hour...
...and after the lights were turned off
The Bund on the banks of the Huangpu River before and during Earth Hour in Shanghai
The historic Citadel of Saladin in Cairo is seen before Earth Hour...
and after the lights were turned off
The Tokyo Tower before and during Earth Hour
Malaysia's landmark Patronas Twin Towers shortly before the lights were switched off for Earth Hour in Kuala Lumpur...
and during Earth Hour
Beijing's National Grand Theatre is seen before and during Earth Hour
The Golden Gate Bridge in San Francisco before...
and during Earth Hour
Lima, Peru, before and during Earth Hour
The Palace of Culture and Science in Warsaw, Poland, before and after turning off the lights
The statue of Christ the Redeemer (which is covered in scaffolding) before and after the lights are turned off in Rio de Janeiro
Antoni Gaudi's La Sagrada Familia in Barcelona with its lights on and after being turned off to mark Earth Hour
The Victoria harbour waterfront in Hong Kong before and during Earth Hour
Jakarta's main business district before and during Earth Hour
St Sava church before and during Earth Hour in Belgrade, Serbia
Berlin's Brandenburg Gate before and during Earth Hour
