From InsideEPA.com (reproduced essentially verbatim with the permission of the publisher Inside Washington Publishers):

EPA will measure the greenhouse gas (GHG) impacts of algae-based biofuels in its final rule to implement the renewable fuels standard (RFS) in response to growing interest in the renewable feedstock, including recent announcements by Exxon-Mobil (as noted in an earlier article) and Dow Chemical that they are undertaking separate projects to help commercialize the technology. Algae is a particularly tempting feedstock choice because it can be engineered to sequester large amounts of carbon dioxide (CO2) and because algae-based biofuel has a similar molecular structure to gasoline, allowing it to be used in the existing transportation infrastructure. These qualities could help the fuel sidestep controversy associated with corn-based ethanol, which some say cannot meet the CO2 reduction goals of the RFS and which, due to its corrosivity, can impact engines, pipes and fuel pumps.

EPA fuels official Sarah Dunham said the agency considers algae “a promising feedstock” that will be included in the final RFS rule. EPA issued its RFS proposal earlier this year to expand biofuels use in line with congressional mandates, and is taking comment on the proposal through Sept. 25. Dunham was speaking to a July 16 meeting of a National Academy of Sciences panel on reducing greenhouse gas emissions from the transportation sector. Algae-based fuels could be considered under the advanced biofuel or bio-based diesel portion of the RFS, according to the proposed rule.Continue Reading EPA Shows Positive Interest in Algae