El Comercio newspaper offices after | © Miguel Bellido / WWF
Golden Gate Bridge after lights out, during EARTH HOUR 2008 in San Fransisco, California, United States. | © John Storey / WWF-US
Earth Hour 2010. Oslo Opera House | © Heiko Junge / SCANPIX
Burj Al Arab during Earth Hour, Dubai, UAE, Saturday 27 March 2010 | © Jumeirah Group
Strip from Mandalay Bay, Las Vegas, NV, USA with lights out. | © WWF / Neill Miller
Billboards and lights are turned off for the Earth Hour event at Yonge-Dundas Square, Toronto, Ontario, Canada. | © Bill Ivy/WWF-Canada
Lights off – Lions Gate Bridge, Vancouver, British Columbia, Canada. | © Jeremiah Armstrong / WWF-Canada
Lights out in Yas Island, Abu Dhabi, UAE | © EAA
Overview of Hong Kong Island and Kowloon with lights on before switching them off to mark Earth Hour 2010. | © Ringo Ma
LAX Airport, Los Angeles, CA, USA with lights out. | © WWF / Asbjorn Christiansen
Ars Electronica Center in Linz after switching the lights off | © Stadt Linz / Bärbel Wagner
National Theatre, Sofia, capital of Bulgaria – After | © Adelina Dzheneva
Llghts out at Tokyo Tower. Tokyo, Japan. Earth Hour 2010. | © WWF Japan / Osamu Yokohagi
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