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Yes the scale today is small. But climate models say we need to be removing about 10 billion tons per year of carbon dioxide from the air by 2050, in addition to massive decarbonization. Net negative.

Therefore, it's not an "if" but a "how". We must scale our ability to remove carbon from the air.

Current emissions are like 40 billion tons. So if you built like a 1000 of them you would make a sizable dent in emissions. 1.2T might sound like a lot, but global GDP is over 100T. Spending 1.2T to keep the climate steady seems well worth it.

Yes but so is the cost TBH. E.g. the bay bridge into SF cost 6.5B.