Mother nature is self-healing. If one species is harming her, over time (It may take millennia) she will fight back to over come the harm being done. If she needs to change the environment to eliminate those that are harming her, she will. She has an ally we humans don't have, time. No matter what we humans do, she will overcome it and evolution will continue minus the planetary cancer called 'Humans'. It may take 100, 1000, 10,000 100,000 or 1,000,000 years, but she will win in the long run. Humans can either wake up or go the way of the dinosaurs. Mother nature doesn't care as she is here for the long haul and will simply evolve another species to fill the void left when the last human passes into oblivion.