Aviation biofuel is a biofuel utilized for aircraft. It is reckoned by some to be the paramount means by which the aviation industry can diminish its carbon footprint. After a multi-year technical analysis from aircraft makers, engine manufacturers and oil companies, biofuels were advocated for commercial use in July 2011. Since then, some airlines have evaluated with using of biofuels on commercial flights. The limelight of the industry has now curved to advanced sustainable biofuels (second generation sustainable aviation fuels) that do not compete with food supplies nor are major consumers of prime agricultural land or fresh water.