Iconic landmarks go dark for Earth Hour

The event is organised by the World Wide Fund for Nature

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  Star Wars enthusiasts huddle with their lightsabers after participating in Earth Hour at Taguig City, Philippines. Reuters

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  The YTN Seoul Tower and the historic Seoul Fortress Wall are seen after their lights went out for the Earth Hour in Seoul. AFP

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  Mumbai's historic railway station Chhatrapati Shivaji Maharaj Terminus is seen in the background from the streets as lights were switched off for Earth Hour, in India. AP

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  The hotel 'Kazakhstan' is seen after the lights are switched off for Earth Hour in Almaty, Kazakhstan. Reuters

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  The landmark statue of Garuda Wisnu Kencana is outlined during Earth Hour in South Kuta, Bali, Indonesia. Reuters

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  During the Earth Hour, the Admiralty building, the Peter and Paul cathedral and the State Hermitage museum still loom large in the skyline at Saint Petersburg, Russia. Reuters

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  Malaysia's landmark Petronas Twin Towers and surroundings with lights turned off to mark Earth Hour in Kuala Lumpur. EPA

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  Commercial buildings switch off their lights in the Central district on Hong Kong Island during Earth Hour. EPA

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  Singapore's Marina Bay Sands hotel and resort fights through the drakness during the Earth Hour. AFP

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  The Sydney Opera House is seen during Earth Hour in Sydney, Australia. EPA

Some of the world's biggest cities went dark in the name of Earth Hour on Saturday night.

Organised by the World Wide Fund for Nature (WWF), Earth Hour encourages people to turn off their lights between 8.30pm and 9.30pm in the name of conservation.

"Nature not only provides us with all the things we need to live – from the air we breathe to the water we drink, and from the shelter we need to the economy we rely on – but also makes our lives better. However, its growing loss puts this all under threat," said Earth Hour's official website.

It began in Sydney in 2007 Earth Hour says it is "now the world's largest grassroots movement for the environment, inspiring millions of people to take action for our planet and nature".