It doesn't follow. Bitcoin chases cheap energy, so wherever green is cheaper than carbon that's where Bitcoin will be mined. Eventually carbon will be more expensive everywhere.

I think the idea is that, as mining fees and power generation requirements increase, you have less incentive to build the most efficient power generation (renewables) and increasing incentives to build financially reliable proven technologies. Coal power plants, though less efficient than solar, have a much better known lifecycle and are easier to plan around.