On Saturday night, cities across the world will go dark as the globe comes together in the fight against climate change.
The voluntary power cut marks Earth Hour, a grassroots initiative organised by the World Wildlife Fund.In cities across the globe, the time between 8:30pm and 9.30pm will be a time of solidarity for everyone worried about the effects of climate change.
Lights at landmarks will be turned off at 8.30pm local time to represent the efforts that are needed to tackle climate change.

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