Photo: Marianna Massey/Getty Images for WWF Australia
Lights out for the Earth
Landmarks around the globe turned off their lights for 60 minutes during Earth Hour, an annual environmental event organized to send a message for global action on climate change.
Photo: Lisa Maree Williams/Getty Images
Sydney's Luna Park goes dark
The annual eco-event kicked off for the first time in 2007 when more than 2.2 million residents of Sydney turned off their lights in a call to action conceived by the World Wildlife Fund and the Sydney Morning Herald.
Photo: Antoine Antoniol/Getty Images
The City of Light dims down
Since its humble beginnings, Earth Hour has grown larger each year, and as of 2012, the event is observed in homes, skyscrapers, government buildings and public landmarks in more than 5,000 cities in 147 countries across the globe.
Photo: Yasuyoshi Chiba/AFP/Getty Images
São Paulo opts for a low power hour
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