Bit of a tangent: > The US produces lot of corn which is used to make ethanol > Ethanol is already produced in large quantities in the US because it's used as

Bit of a tangent: > The US produces lot of corn which is used to make ethanol > Ethanol is already produced in large quantities in the US because it's used as a biofuel Isn't it kind of the other way round? Ethanol is produced from corn in large quantities because of government support requiring that more ethanol be used than the market would independently want, because of the political power of the subset of the US that grows a lot of corn. I.e. oversupply of corn -> regulation to create artificially large market demand for corn+derived biofuel.