My proposal to those countries who still consider the energy demand of mining before adopting BTC as legal tender
Is there any government that is even considering adopting bitcoin as legal tender that is also hesitant because of energy consumption concerns? I seriously doubt it.
We've always known that governments don't like bitcoin because it is decentralized which means they can never control it, print it out of thin air, censor people's transactions, and stuff like that. Everything else including environmental impact, energy consumption, etc. is just an excuse because if they announced the real reason ("we [the gov.] can't control bitcoin so we fight it") it would lead to mass adoption in a blinking of an eye
As for the "waste to energy" idea, it is already being done in a lot of developed countries. The electricity it produces is not enough for mining farms though specially since there are easier and "cleaner" way of getting that electricity like something as simple as solar panels.