I'm no tree hugger either, but i can't think of one thing Humanity has done for the benefit of the Planet or animal life, negative however is a list a mile long. Thats a disease imo
Fauna grows back after Animals use it, Humans stop it from returning (cities). Humans hunt for sport & food, animals hunt just for food, Animals haven't polluted the atmosphere, haven't decimated forests, didn't create radiation, torture devices ect...
Face it, we suck as a species. If humanity was wiped out tomorrow the planet would be a better place for the environment and the rest of the World's inhabitants.