When Denmark's Novozymes first wondered in 2000 how its mass-produced enzymes could be used to make advanced biofuel, the industry did not exist and only now is the fruit of its labour emerging after years of being lampooned as a "fantasy fuel". But as commercial production of transportation fuel made from plant waste rather than valuable corn finally starts in the United States, Brazil and Europe, Novozymes has already turned its gaze towards bioplastics and even diapers. With the biofuels sector waging a drawn-out regulatory battle with 'Big Oil' over potentially damaging cuts to biofuel targets in the United States, Novozymes says it has contingency plans.