The United States military budget -- for the single year of 2019 -- was $693 billion.https://twitter.com/tictoc/status/1187219939251445761 …
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Curious: do you know the source of the $300 billion number? How believable is it?
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I can't find the exact paper - just the articles it's referenced in - but that figure was reported by the UN:https://www.bloomberg.com/news/articles/2019-10-23/how-to-halt-global-warming-for-300-billion …
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aggregate sum of the least-cost solutions, at necessary magnitude, they report
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I thought it was in the trillions, but perhaps that was the cost of dealing with the consequences of climate change.
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I've looked at a quite a few cost estimates for different approaches. $300 billion is far lower than any of the others, which tend to be in the hundreds of billions for each year. A problem with most of the proposals is that the models tend not to be very believable.
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It is not believable at all as a one off cost. The lowest cost potential solution I know of (dumping olivine into the ocean to capture the CO2 emissions) would be very optimistically $250B/yr ( https://projectvesta.org/plan/ ) just to offset current human emissions.
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That’s COST as in financing it.. There's then the 'cost' of effort, sacrafices of current lifestyles, and incentive to decision makers (loss of investment in polluting industries) we do NEED to do it! but it's not a simple accounting question - mindset needs to be changed.
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