Just saw this post from Jamais Cascio, titled “The Earth Will Be Just Fine, Thank You”, which I think sums things up pretty well:
Critics of environmentalism often claim that eco-activists hate humans, that we value the Earth more than we value ourselves. With very few exceptions, nothing could be further from the truth. Environmentalism is fundamentally about making sure that human beings, and human civilization, can continue to thrive on our home planet for centuries, millennia to come. Environmentalism, in its demands for respect for nature, ultimately demands that we respect ourselves.