The irony is that if humans became extinct, you ain't seen nothing yet in the way of what would become extinct, most of the cultivated plants because the weeds would choke them all out and pests (and the strongest predators) consume any that were left.
I think a lot of people are doing the best they can to strike a good balance between preserving the environment and quality of human life. Some are just quietly doing their own thing to make things better, not making some political brouhaha out of it.
Before there were any humans, when was that?, way way back, a lot of things went extinct. We do know that. Humans had NOTHING to do with it.
I wonder how many NPR types eat "organic" food (what a stupid term, btw; what the hell is "inorganic" food?) despite the fact that it requires 20-30 percent more land to grow, and habitat destruction (the same NPR types will claim) is a major factor in species extinction?