Nature has a way of correcting the excesses over time be it a plague or climate change (we are already seeing that now) or the earth turning on it's axis. Maybe the warming we've had will shut off the conveyor belt (Gulf Stream) and plunge Europe into a severe cold period (maybe we've already seen a sneak preview of that this past winter in Europe). If the earth turns on it's axis that would cause an instantaneous change and might wipe out millions like it did to the dinosaurs and mammoth elephants millions of years ago. Might happen tomorrow.
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