Time’s Bryan Walsh reports on a new study Nature Geoscience that discusses what increased levels of carbon dioxide in the atmosphere could do all over the world – mostly lots of glacier melting, sea level rises and desertification. Walsh calls the study “an imperfect study, to say the least” but the real point of contention is the tipping point for the amount of carbon that can be in the atmosphere. Walsh writes:

As of 2100, CO2 concentration in the atmosphere reach some 1,000 ppm—two and a half times the current level, and well above the 450 or 350

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