Can you imagine the re-election chances of a politician that put a fuel rationing program like during ww2 into effect? The loss of campaign contributions from auto makers, construction industry, shopping mall owners and others?

Bio fuel made from food crops is an error in judgement, Argentina I believe uses waste products from sugar cane. Have they tried grass clippings? A lot of communities don`t want them thrown out in the trash it takes up land fill space. A free source if usable, and doesn`t affect food supply.