Reply #76: I think one of a couple things will prevent that

[Nikia]

The nice option is that we take the damage that we're doing to the environment seriously now. We make this our number one goal. Unfortunately, the global capitalist machine doesn't seem to be too intersted in doing this anytime soon and will probably resist as everything falls around them.
The not so nice option is that civilization collapses and most of us are forced to abandon our factories and our fuel burning vehicles. There will be a major die off in the mean time. At this point, the damage that we are doing to the planet will be slowed enough to allow the planet to recover. Humanity will start again as pre techical, perhaps so much that the past world will be remembered only as mythology that sensible people don't believe. Perhaps this has already happened in the past.
There could be other options somewhere between the extremes. Our world and our society will change though. Our world cannot substain uncontrolled global capitalism for much longer.