This video shows areas around the world turning off their lights for Earth Hour.
Shown in the video are Bangkok, Beijing, Kuala Lumpur, Jakarta, Moscow, Doha and Zagreb.
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There will be lighter winds for all of us than yesterday, although it will still feel cool.
Senior fashion analyst at Mintel Tamara Sender said: "For the first time ever sales of trainers have overtaken high heels."
Of the 1,600 business leaders questioned, a third planned to scale back hiring staff if the £7.20 an hour rate for adults increases.