This report, produced jointly by the International Energy Agency (IEA) and IEA Bioenergy, examines the current state-of-the-art and the challenges for 2nd-generation biofuels (produced from crop and forest residues and from non-food energy crops) technologies. It evaluates their costs and considers policies to support their development and deployment.
Link: From 1st- to 2nd- Generation Biofuel Technologies – Full Report