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image captionCan bitcoin mining provide a boost to renewable energy usage?
Tesla chief Elon Musk has agreed with Twitter boss Jack Dorsey, who has said that bitcoin incentivises renewable energy, despite experts warning otherwise.
The cyrptocurrency s carbon footprint is as large of some of the world s biggest cities, studies suggest.
But Mr Dorsey claims that could change if bitcoin miners worked hand-in-hand with renewable energy firms.
One expert said it was a cynical attempt to greenwash bitcoin.
China, where more than two-thirds of power is from coal, accounts for more than 75% of bitcoin mining around the world.
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