If the prospect of $500B costs until 2100 ($6B/year) in the future seems maddening, then what would people say about an immediate cost of more than $1000B/year, which is what the expected costs of rapid greenhouse reductions (https://www.technologyreview.com/s/527196/how-much-will-it-c... , $13T until 2030 recent estimate) would be, which wouldn't still prevent much of that sea level rise and coastal property damage?