According to a communication last year from NASA's former lead climate scientist James Hansen, we would likely need to spend trillions of dollars per year extracting CO2 from the atmosphere to keep below the 2 degree C ceiling rise in temperature. I am interested to hear Paul Krugman's thoughts on this issue, because not much else will matter unless we remove boatloads of carbon from the atmosphere. We're talking about massive famines, economic decline, societal breakdown even in developed nations, etc. <a href="http://www.columbia.edu/~jeh1/mailings/2021/NovemberTUpdate+BigClimateShort.23December2021.pdf" target="_blank">http://www.columbia.edu/~jeh1/mailings/2021/NovemberTUpdate+BigClimateShort.23December2021.pdf</a>

According to a communication last year from NASA's former lead climate scientist James Hansen, we would likely need to spend trillions of dollars per year extracting CO2 from the atmosphere to keep below the 2 degree C ceiling rise in temperature. I am interested to hear Paul Krugman's thoughts on this issue, because not much else will matter unless we remove boatloads of carbon from the atmosphere. We're talking about massive famines, economic decline, societal breakdown even in developed nations, etc. <a href="http://www.columbia.edu/~jeh1/mailings/2021/NovemberTUpdate+BigClimateShort.23December2021.pdf" target="_blank">http://www.columbia.edu/~jeh1/mailings/2021/NovemberTUpdate+BigClimateShort.23December2021.pdf</a>

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