At the moment, the planet is on track to warm more than three degrees Celcius by century's end, which one recent study found would do $551 trillion in damage—more money than currently exists on the planet.
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"Study" - i.e. computer simulation based on stuff we don't know and physics we haven't figured out and solar data we don't have and a plethora of other stuff.
I've always said there's only one thing with a worse track record than economic forecasting and that is climate forecasting. The absolute worst of all, however, are economic forecasts based on climate forecasts.