Earth Hour will be celebrated on Saturday 19th March 2016, when people around the world will be encouraged to switch off their lights between 8:30 and 9:30pm UK time. Many famous buildings around the world will turn off their lights - last year these included the Alhambra in Granada, the Colosseum in Rome, Sydney Opera House and the Empire State Building in New York. Earth Hour was started in 2007 and is a WWF initiative, with a separate non-profit organisation based in Singapore. Its mission is to unite people to protect the planet. In 2015 there were 620,000 Earth Hour actions in 172 countries, involving a range of issues, including renewable energy, solar panels, saving power, protecting forests and planting trees.
Nick Garbutt / The view at night from 'At the Top', 124th floor of the Burj Khalifa, the world's tallest building at 829.8m at night. Dubai, United Arab Emirates. April 2013
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Gavin Hellier / The Burj Khalifa at night, completed in 2010, the tallest man made structure in the world, Dubai, United Arab Emirates, 2011
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Gavin Hellier / Looking up at the Empire State Building on a rainy evening, Manhattan, New York City, USA 2009. No release available.
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Nick Garbutt / Greater Flamingos (Phoenicopterus roseus) feeding in lake at sunrise at Ras Al Khor Wildlife Sanctuary (Ramsar site), with the Dubai skyline in the background and the first rays of the sun catching th...
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David Fleetham / Sydney Harbour with Opera House and skyscrapers at night, Sydney, Australia.
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Julia Bayne / Picadilly circus at night. London, UK
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Gavin Hellier / The Alhambra and snow capped mountain background, Granada, Andalucia, Spain
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Gavin Hellier / The Colosseum floodlit at night, Rome, Italy
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Ernie Janes / Silhouette of Big Ben and Houses of Parliament on the River Thames at dusk, London, UK, November 2005
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Rick Tomlinson / Tall Ships lit up at night near Tower Bridge on the River Thames, London.
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Gavin Hellier / Marina Bay Sands at dusk, Marina Bay, Singapore, February 2012
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Gavin Hellier / Elevated night view of the Petronas Twin Towers, illuminated at night, Kuala Lumpur, Malaysia, 2012. No release available.
