Market forces are not fully understood in complex systems but it does not mean they do not work.
Forcing employers to give more money to employees (rising wages through regulation) may cause some unexpected/unaccounted things (more consumption etc.).
Taxing something (like CO2) will definitely do not help that thing. Solving just Bitcoin problem is both hard (how do you prevent making certain computation while connected to the network, or how do you prevent buying certain digital goods) and is only part of the problem (it does not mean that fixing part of the problem is not worthwhile, but they are easier ways to solve bigger part of the CO2 problem).
Forcing employers to give more money to employees (rising wages through regulation) may cause some unexpected/unaccounted things (more consumption etc.).
Taxing something (like CO2) will definitely do not help that thing. Solving just Bitcoin problem is both hard (how do you prevent making certain computation while connected to the network, or how do you prevent buying certain digital goods) and is only part of the problem (it does not mean that fixing part of the problem is not worthwhile, but they are easier ways to solve bigger part of the CO2 problem).