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The article says that this is not a huge problem. If you have a serious problem with every "unnecesary" electricity consumption, you are already on platform that has minimal energy costs for running the blockchain.
The LN built on Bitcoin is already capable to handle much more transactions than VISA can (well, it depends who is a sender and who is a receiver... theoretically, you can make unlimited number of transactions within one channel instantly... it just depends on your PC).
So that's why I think that the problem is already solved although I am a big fan of every effort to improve cryptos. I have seen several reactions on NANO that it is a nonsense, shitcoin and so on... but I actually don't know a lot about it so I just wish you a good luck with your NANO hodlings. :)

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