Environmental change is real. Yes.
It may or may not be a problem for humanity, we truly do not know.
Why doesn't the free market mitigate the problem? Do you have sources for that? And, if human consumption is the driving factor, what is anyone doing about China, India and Russia...whose negative output dwarfs the US and Eu?
No, I don't believe that "usage" or "consumption" taxes or fair or realistic. Tell that to the climate warriors that jet set around the globe to tell me that my 2008 F150 is the major contributing factor. gtfoh
Nope, not a smoker. My dad is/was and still says he should have a seat in Devaney in perpetuity cause "smoker's taxes" paid for it.
As to the rest, we learned as we go...and some things are definitive and some are supposition.