I think a lot of environmentalists do have a very anthropocentric view though - humans are viewed as a uniquely corrupting, malevolent force that's a blight on the natural balance of the world. But every other species would do the same, if they could. Our worst instincts are the ones that we share with all other life on this planet - to expand at the expense of everything else. To be selfish, and grow without limit.
Ironically one of the things that's unique to humans is our ability to feel guilty about our impact on the environment.