There's also ethanol. It has the trifecta of govt support, a subsidy, an import restriction, and a mandated use. This has significantly reduced the amount of

There's also ethanol. It has the trifecta of govt support, a subsidy, an import restriction, and a mandated use. This has significantly reduced the amount of US corn available for food and it also decreased the amount of other food grown as farmers switched to corn when possible.