The hubris is never ending and heartbreaking. I'm disavowing that 'we' bit. The question has been asked and must continue to be asked and not assumed:
When will they every learn?
I agree about the hubris part, but I think the better question is: When will we ever learn?
Because I type this on a computer made mostly of plastics, and have been contemplating lately about flying from California to New York this summer for a week-long workshop on transpersonal psychology. I have less useless shit lying around than most people and I don't own a car, I shop at farmers' markets, etc. And yet my carbon footprint, if replicated by everyone person on the planet, would still result in runaway global warming.
So who's really to blame here...?
"We never learn" in large part because we don't want to.