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Re:Widespread and sometimes drastic marine oxygen declines by ash on Tuesday February 26, 2019 @02:46AM (#19252665)
Copenhagen Consensus tries to prioritise "solutions to the world’s biggest challenges" using cost–benefit analysis:

https://en.wikipedia.org/wiki/Copenhagen_Consensus

https://www.copenhagenconsensus.com/

Re:Widespread and sometimes drastic marine oxygen declines by bryanrasmussen on Tuesday February 26, 2019 @03:10AM (#19252751)