This statement is ridiculous since miner could just mine with renewable/sustainable energy which has less carbon and it only has small impact on cryptocurrency which doesn't use PoW. Report by Bitcoin Mining Council also show majority Bitcoin miner use renewable/sustainable energy.
I agree. It does look like Zeihan and many others think because Bitcoin uses the same energy as Switzerland roughly, it can only ever function using this amount of energy. They dont understand the difficulty adjustment and game theory elements.