Oops.
There's very few aspects of a higher standard of living that doesn't involve something the lefties disdain. Yet if we all returned to the lifestyle they wished, most of them would die, because they have no skills to survive that kind of lifestyle.
My response to lefties that advocate that green crap is to demand they live completely self sufficiently with no modern conveniences for one year, and if they survive it, then they can run their yap trap about how the world should be.