"There are processes, nuclear waste build-up, urbanization, land disturbance, there are processes which, if allowed to run on indefinitely, would wreck the whole system and pitch it into chaos. Buy Confucius said "No tree grows to heaven," and what he meant by that was: it's fruitless to project any process to infinity because any process projected to infinity creates some kind of catastrophic scenario. If no fruit flies died in six months the Earth would spin out of its orbit from the weight of fruit flies. Now, I don't thing that's true. (laughs) But what an image!"