US FAA Office of Environment and Energy, director, Carl Burleson, has said that the agency hopes to have a "synthetic fuel blend" for powering commercial aircraft "certified by the end of this year." He told reporters that the agency was looking for a "gasoline source" that is 50 per cent synthetic.

He did not elaborate on the source.

He also said that FAA is targeting 2010 to certify a biofuel blend and 2013 to certify "full biofuel" to power commercial flight.