Bitcoin uses as much power as Vegas:
Quote:
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The conclusion of the study: The Bitcoin system has a carbon footprint of between 22 and 22.9 megatons per year. That is comparable to the footprint of such cities as Hamburg, Vienna or Las Vegas.
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https://www.eurekalert.org/pub_relea...-bcc061319.php
I wonder if Libra coin is going to use a similar system. I can't imagine it makes sense to.