Hour when most of the earth went dark
Mikhaylo (St. Michael) Golden Cupolas Cathedral before (top) and during Earth Hour in Kiev March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
India Gate before (top) and during Earth Hour in New Delhi March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Palace of Culture during (top) and after Earth Hour in Warsaw March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Hermitage museum during (top) and after Earth Hour in St. Petersburg March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
University embankment during (top) and after Earth Hour in St. Petersburg March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Ivan Vazov national theatre before (top) and during Earth Hour in Sofia March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
National library before (top) and during Earth Hour in Minsk, March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
"Ham Ca Map" building before (top) and during Earth Hour in Hanoi March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Leifeng Pagoda before (top) and during Earth Hour in Hangzhou, Zhejiang province March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. Leifeng Pagoda, located at the south of west lake in Hangzhou, was originally constructed in the year AD 975 before the Song dynasty. It collapsed in 1924 but was rebuilt in 2002 as a tourist attraction. (REUTERS)
Marina Bay Sands hotel and ArtScience Museum (R), before (top) and during Earth Hour in Singapore March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 pm local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Financial district during Earth Hour (bottom) in Shanghai March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
A view of the Badaling section of the Great Wall before (top and middle) and during Earth Hour on the outskirts of Beijing, March 31, 2012. Earth Hour, when everyone around the world is asked to turn off lights for an hour from 8.30 p.m. local time, is meant as a show of support for tougher action to confront climate change. (REUTERS)
Petronas Twin Towers in Kuala Lumpur, a Malaysian landmark, pictured as lights are turned off during Earth Hour (top) and turned on after Earth Hour (middle, bottom) March 31, 2012. Landmarks in thousands of cities, from Sydney Harbour Bridge to the world's tallest building, the Burj Khalifa in Dubai, will turn off the power for Earth Hour, the sixth such event promoting a sustainable future for the planet. (REUTERS)