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Angeleno88 t1_iudsy5o wrote

Not guaranteed but it is realistic that various feedback loops and tipping points have already been reached that will lead to 4 degrees within a couple hundred years. That level of warming would destroy global human civilization as we know it. Even 3 degrees would likely have that result. We will hit 2 degrees between 2-4 decades depending on what actions we take going forward. This century will determine if we make it as a species.