Introduction: Next generation biofuels
Proponents of biomass-based fuels push for sustainability against a steady tide of conflicting analysis, but can advanced biofuels cut the mustard?
Agriculture: Beyond food versus fuel
The most controversial aspect of biofuels is the perceived competition for farmland. Will advances in biofuels and agriculture send this trade-off speeding towards the history books?
Fuel options: The ideal biofuel
A biomass-based fuel needs to be cheap and energy dense. Gasoline sets a high standard.
Lignocellulose: A chewy problem
The inedible parts of plants are feeding the next generation of biofuels. But extracting the energy-containing molecules is a challenging task.
Algae: The scum solution
The green slime that covers ponds is an efficient factory for turning sunlight into fuel, but growing it on an industrial scale will take ingenuity.
Perspective: Don't foul the water
Shifting from corn to perennial crops in making biofuels is essential to save clean water, argues Jeremy Martin
Local benefits: The seeds of an economy
Biofuels could help poor nations modernize, but scaling up aid supported projects to commercial operations is far from easy.
Perspective: A new hope for Africa
Bioenergy could help bring food security to the world's poorest continent, say Lee R. Lynd and Jeremy Woods.
Policy: Fuelling politics
Biofuels have been hailed as key to reducing our fossil-fuel dependence, yet their environmental and social impacts remain uncertain. A complex task lies ahead for policy makers.
Perspective: Lessons from Brazil
Thirty five years of experience has taught one of the world's leading biofuels producers several essential lessons, which other countries should heed, says Marcia Moraes.
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