Again with this same tired nonsense on Hacker News. Famous for censoring worthwhile comments to death while leaving up misinformed "curious" posts that mislead everyone. Bitcoin is using half of the power as banking systems. Bitcoin is using half of the power, of the gold industry. Might I suggest, if you think you can suggest banning things for using too much carbon, that you first quit working, quit driving your vehicles, and disconnect the power in your house. I don't think it's good for the environment in you doing so. In fact, your carbon consumption should be banned. Turn your computers off. Unplug your wasteful device chargers, you've had enough.