Probably has to do with this: ''One Nano booster, Patrick Luberus, counters that his preferred altcoin is the “fastest cryptocurrency” and uses just one-10,000th of a kilowatt-hour per transaction, as compared with the 600kWh per Bitcoin transaction.''
and also this: ''With Bitcoin's energy consumption at the forefront of cryptocurrency discussions, now is the time to take notice of the eco-friendly alternative, NANO!''
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