Not to mention pow mining is not location or resource specific. It encourages cheap and efficient use of energy. Miners preffer low cost, surplus energy and will relocate wherever that may be. Pow can use nuclear, thermal, wind, solar and alsoo dirty fuels, just like a Tesla. If you have an issue with the use of dirty fuels, then campaign against that specifically, throwing pow under the bus entirely is short sighted.
Also what does btc and crypto replace? The carbon footprint of traditional finance, banking and the military actions to preserve it are massive polluters. Even at its infancy, pow crypto is already a good direction to improve sustainability.