I've been pushing the idea that Green IT 2.0, Forrester's term for using IT to green everything else, will make Green IT 1.0, making IT itself more sustainable, look like a rounding error.
Actually, that's what Cisco founder John Chambers once said comparing e-learning to email. I hope this prediction's more accurate than that one.
Effective use of information, whether we call it IT, or KM, or whatever, is the key to making it possible for humans to survive on this planet. Nature will do fine; losing a hundred thousand species is chump change to Her. But unlike all those other species, we get to choose whether we're one that stays or goes.
Like I said, Nature doesn't care whether we take it or leave it. Humans mean about as much to nature as a million brain cells matter to an all-night binge-er.