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From the article:

VISA Network Statistics

VISA's estimated annual electricity consumption (TWh) 0.54

Number of U.S. households that could be powered by VISA 50,000

Electricity consumed per transaction (KWh) 0.00651

Number of seconds the electricity consumed by 1 VISA transaction could power 1 U.S. household 19

Number of VISA transactions that could be powered with the electricity consumed by 1 Bitcoin transaction 20,983 `



A decentralized network has trade offs associated with it.




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