World leaders may have set their sights on cutting greenhouse gas emissions at the G8 but their long-term plans come as the viability of a popular alternative to fossil fuels is coming under increasing scrutiny. From Tokyo, Al Jazeera's Paul Allen reports on the doubts surrounding the future of biofuels. Author: AlJazeeraEnglish Keywords: biofuels environment climate greenhouse paul allen aljazeera Added: July 9, 2008
