Environmental impact is not a bitcoin question but an energy source question. You really need to ask yourself why aren't we hearing the concern about air conditioning, Christmas lights, ect? Bitcoin is hope for humanity. The energy consumption is testament to its value. The real question is do we want to live in a free world or do we want to be slaves. So no, I dont think it is a debate worth having. The miners should be able to chose what they do. Yo choose what you do. I choose what I do. Period.
If someone wants to learn why is bitcoin worth so much I'm happy tp talk but if they dont get it and think we should debate the energy question I have no interest because they have already decided. We can debate endlessly but its a question of preference and choice. These people want to control others that have different preferences. Nothing to discuss.