Photos: Cities worldwide turn off their lights to mark Earth Hour

Annual event calls for action on climate change and the environment

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Mumbai municipal corporation's headquarter building is seen lit, top, and then the same location in darkness when the lights are turned out for one hour.
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Sydney Harbour Bridge before and with their lights switched off in Sydney, Australia.
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A general view of the Indian President House before (top) and after the lights were turned off in observance of the Earth Hour in New Delhi.
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Tokyo Tower before and with its lights switched off in Tokyo.
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The Petronas towers before and after the lights were switched off in Kuala Lumpur, Malaysia.
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Tokyo Station before and with its lights turned off in Tokyo, Japan.
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Marina Bay Sands hotel and resort before (top) and with the lights turned off in Singapore.
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The Supertree Grove at Gardens by the Bay before (top) and after lights were turned off in Singapore.
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Hong Kong skyline before (top) and after the lights were turned off.
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A general illuminated view of the Grand Palace before (top) and after the lights are turned off in Bangkok, Thailand.
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The Temple of Dawn before (top) and after lights were turned off in Bangkok, Thailand.
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Kuala Lumpur's skyline, including Malaysia's landmark Petronas Twin Towers, before (top) and after the lights were turned off to mark Earth Hour, in Kuala Lumpur, Malaysia.

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