Carbon taxes can very effectively reduce the amount of carbon-emitting energy used by bitcoin in jurisdictions it is enacted. How to coordinate a global carbon

Carbon taxes can very effectively reduce the amount of carbon-emitting energy used by bitcoin in jurisdictions it is enacted. How to coordinate a global carbon tax seems like a much bigger problem than cryptocurrency. At 0.5% of global energy use, even if crypto mining was magically eliminated in an instant, 99.5% of the problem would still remain. Also, feels weird to try to address this problem on the demand side instead of the supply side (which has much more direct influence). Machine Learning training is power intensive and location-insensitive, but it feels odd to worry about 'how to enforce carbon taxes on ML training'. "Which uses of energy are economically profitable" seems tangential to "how much carbon is produced by energy generation".