The American Petroleum Institute filed suit in the U.S. Court of Appeals for the District of Columbia Circuit July 24 against the Environmental Protection Agency over the agency’s denial of petitions to waive requirements for refiners to blend cellulosic biofuel into their fuels in 2011. Industry associations previously asked the agency to waive the requirement under the renewable fuel standard to blend 6.6 million gallons of cellulosic biofuel into their fuels in 2011 because not enough fuel was produced to meet the requirement, saying they were being penalized for failing to purchase an unavailable product. The Energy Independence and Security Act initially outlined a 2011 requirement of 250 million gallons.