Supply and demand. If you want mining to reduce emissions, increase the cost of energy. Bitcoin will remain unaffected. Don't blame bitcoin because of the cost of energy. Blame the energy producers for selling it to miners at that price.
Do you also suppose that we should reduce vehicle emissions by increasing the cost of gasoline? Why isn't it fair to blame vehicles that run on gasoline and vehicles which are particularly inefficient at running on gasoline?
No it's not. I'm saying you can fix the problem by modifying one constraint. Fix the cost of energy, and you fix your problem with energy wastage. It will make absolutely zero difference to bitcoin what the price of energy is. If energy is more expensive, mining will reduce, and bitcoin difficulty resets to the lower mining hashrate.
> Do you also suppose that we should reduce vehicle emissions by increasing the cost of gasoline?
Of course. It's ludicrous to think otherwise.
Again. Give me a break...