The lights are being switched off around the world at 8:30 p.m.
on Saturday evening, to mark the 10th annual Earth Hour, and to draw attention to climate change.
Internationally the list includes some of the world's best known sky-scrapers and historic buildings including the world's tallest building, the Burj Khalifa in Dubai, London's Big Ben and Houses of Parliament, the Colosseum in Rome, Istanbul's Blue Mosque, the Eiffel Tower, Moscow's Kremlin and Red Square and the Pyramids of Egypt.
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