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Saying 4°C warming will only cause "7% loss in world GDP" seems wildly inaccurate.
Reminds me of @JKSteinberger: "Saying one knows that 4° of warming will result in x% of GDP costs, when it will make the tropics uninhabitable is just nonsense and should be treated as such." 1/https://twitter.com/kmac/status/1164069049283649537 …
More on this from @JKSteinberger (tweets 2-4 in this thread):https://twitter.com/JKSteinberger/status/1162612359975841792 …
I know. The robustness, value & effect of such estimates is a big topic of discussion. @GernotWagner @ClimateFran are among the deep thinkers on this.
I mean, from everything I understand, 4°C warming would be civilization-collapsing bad. That it would only cause 7% loss in GDP seems... ridiculous. GDP would likely cease to exist or be a meaningful concept in world that warm.
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