I read a detailed research paper back in the 90’s that described the massive energy input it takes to grow and turn corn into fuel. It was very detailed talking about how corn requires the most fertilizer which is of course created from natural gas or petroleum.
Then there is harvesting, transportation and the conversion process. These all require massive fuel. In the end it concluded that it took far more energy to produce corn fuel than the energy output. I cannot find the paper but it was around 1995 or so that I read it.
Either Trump or Cruz wanted to increase corn subsidies. I can’t recall. (or maybe I can.)
I remember it too. Somewhere in the last year there was a notation somewhere on that finding. Wish I could find it.
Anyway, I’ve never believed in Global Warming and certainly not due to carbon dioxide, necessary to maintain plant life which supplies the oxygen we breathe.