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Fertilizing the oceans with iron could help remove a gigaton of carbon dioxide per year
(interestingengineering.com)
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this post was submitted on 28 Jul 2023
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Dumping money/metal into the oceans cannot be made profitable. Even if it can, there's always going to be a more profitable use for that material.
I think they meant in terms of subsidies, like corn growth currently.
Corn growth and other subsidies are profitable to the government, because the money comes back to them in lobbying/bribery.