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In reply to the discussion: GLOBAL EXTINCTION WITHIN ONE HUMAN LIFETIME? [View all]AverageJoe90
(10,745 posts)An interesting thing I recently found out while casually skimming the web was that, at the end of the Younger Dryas period, a rather sudden warm spell put an end to the Ice Age and the Earth's temperature warmed as much as 7*C in just 40-50 years, and maybe on the order of somewhere around ~10*C in total. As far as it's known, there were no significant numbers of species that went extinct because of that, and that's twice the rate of the absolute worst-case scenario of ACC, so that does give me some valid hope.
It is true that humanity will face a number of great challenges in our future and there may indeed be many who die from direct effects of climate change; maybe not a few billion as some believe, but even half a billion deaths would probably qualify as the world's greatest tragedy by far.