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Coffee is the perfect product for this because the farmers get paid peanuts and the actual coffee is sold to customers at like 1000x higher price, so there's probably a lot of room to pay a premium for "green logistics" while still making a tidy profit

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I think that's a great way to look at it. Like those vertical farms that exclusively targeted luxury/high-margin crops. Incapable of competing with real logistical chains, but efficient enough to focus on capturing the cream of the market.

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For what it’s worth, any sailing vessel beats any diesel container ship in ocean pollution. That, and ballast tank contamination, though that is not unique to any propulsion type, but instead to ship design.

If the crew were on land they'd still be eating three meals a day.

So I don't see how food factors into this. It doesn't really matter if they're eating at another job on shore, or eating while crewing a ship.

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