I agree with all of your comments. I did not mean to imply that "promote" mean "was effective." I believe, with low confidence, that ethanol's net positive fo

I agree with all of your comments. I did not mean to imply that "promote" mean "was effective." I believe, with low confidence, that ethanol's net positive for GHG production wasn't realized until the 1990s, due to an increase in corn yields from what was possible in the 1970s and the oil crisis.