The 4th World BioEnergy conference will be held 25-27 May 2010 in Jönköping, Sweden. Abstracts are sought through 10 January 2010 with notification to authors in early February and final papers due in April. Key topics that crossover with geo-engineering include, but are not limited to, waste-to-energy; opportunities and management of energy crops, agricultural residues and by-products; biofuels for transport – biogas, bioethanol and biodiesel; and policies. Learn more in the conference’s first call (PDF).