See my previous post regarding drought. Not only does the corn ethanol take away acreage from food crops, it uses WAY more water than crops like wheat, beans, etc.
Oh - I also saw a paper (from Berkely???? of all places iirc), that the breakdown of the corn as a fuel releases some other chemical combination that is 100 times worse as a “greenhouse gas” than the oil that it is replacing!
For all their nuts, Berkeley has real hard Science types. A friend I went to college with got his Chemistry PhD there, and he’s the real deal, and very much not a Leftist.