MTBE is there as a result of the activities of envirowack jobs, I kinda' figured that after a few years someone would then complain about the poisonous effects of it. All that needs doing to stop its' use is to stop using it. It's completely unnecessary and doesn't even do what it's supposed to do.
Gasoline is good for me when it's used as a fuel, but it's not for any other use, except as a dangerous solvent.
Ethanol is a solution to a non-problem, and it still costs more, and in fact pollutes more, to make it. Some folks don't count the fuel burned by the farm tractors and combines.