Tbh, I don't see bitcoin being the greater of all the evils contributing to climate change. There are still factories burning a lot of fossil fuels and automotive using the same type of fuel for the past decades or so. All of these carbon emissions are already there together with the talks about climate change way before bitcoin hit the radar of so-called 'concerned' citizens. If I were to ask, there's really not much we can do about the power consumption of the miners and we're not the only industry to use such levels of power consumption in the world.

Switching to PoS is not a bright move, and if we really want to save this world, look for better and cleaner alternative energy solutions and ditch the fossil fuels.