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Cryptocurrency goes green: Could 'proof of stake' fix energy concerns?

Bitcoin relies on many computers to crunch difficult math problems. But it doesn't have to. See the latest tech, science and cultures takes from NBC News.

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Cryptocurrency goes green: Could 'proof of stake' fix energy concerns?
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    Cryptocurrency goes green: Could 'proof of stake' offer a solution to energy concerns?

    Cryptocurrency goes green: Could 'proof of stake' offer a solution to energy concerns?

    At any particular moment, thousands of computers around the world are humming away, crunching complex math problems that create and sustain bitcoin. This network gives bitcoin its appeal: decentralized, always on and easily tradeable. But it also means the network is constantly using energy — a …

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