Nature will find a way to harmonize and create balance. The human race is due for an epic smackdown. Once, your food supply is affected, invariably that will lead to war of resources (violent or otherwise, but it is usually violence) and then the human population depletes at a furious rate. At which point, teh Earth solves its cancer problem.
Of course, I can't help myself, but our fox reading friends will invariably blame everone but themselves. Or maybe "God did it"