I think its for the betterment of the planet that humans go extinct. I think so and thats why I think we should cause humanity's extinction as religion isn't doing the job fast enough. Nietzsche said that man must become eviler and maybe this is what he meant: we must cause ourselves to go extinct.
Look at the death camps of Nazi Germany, they were run by a reletively small number of soldiers yet managed to kill 11 million humans over just a few years. We could ship the population of the world to giant death camps run by people who will comit suicide or self-sterilization after the job is done. Or they could make a virus that kills only humans and no other species, and the problem will be fixed.
We can do this in humane ways too, scientists could create a virus that sterilizes all humans and the species could go extinct that way.
With humans gone all the worlds problems will solve themselves as humans are the only ones who create problems as they do not exist otherwise because animals cannot perceive hardship.