Lowering Bitcoin's energy consumption is literally an attempt to hack at Bitcoin's security, but because Bitcoin mining is so modular, it won't work. The miners will just move where ever its profitable. All this will be is the US shooting itself in the foot, limiting its own ability to collect taxes. Tick tock next block.
Game theory will come into play too. US won't enjoy watching Russia, Iran, and possibly North Korea mining bitcoin and getting rich while US worries about baseless climate fud.
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