Algae based bio-diesel has zero sulfur. Had the EPA truly been motivated by wanting to reduce emissions, they would have worked to increase bio-diesel production. One possible example: Linking the amount of money eligible to be paid under the CRP (crop reduction program) to the number of barrels of bio-diesel produced on the farm.
The net effect of such a program would be to allow small farmers to be more independent by producing their own fuel, and it would have significantly increased the amount of bio diesel available to the market.
However, that was NOT the EPA’s goal. Their goal is to implement controls over the population and implement as much of Agenda 21 as possible.
Due to the cost, we are thankful they didn't. Please, no government selection of which industry should thrive or fail.