Effectively all growth in corn production over the last 20 years is for ethanol. ~20 million acres of conservation land, grassland, and soybean rotation was turned into corn monoculture that effectively strip mines the topsoil. Meanwhile it’s the most fertilizer dependent crop with only a 40% uptake rate. So ~1.7 million tons of nitrogen runoff flows into the Mississippi basin annually while also polluting their own water supplies. This runoff ends up expanding the Gulf deadzone, which is also where 40% of domestic seafood comes from. It’s hard to find a worse way to create fuel, with a wicked level of waste and downstream consequences.