1. ADM (2009) A climate of innovation in Illinois: investigating geologic carbon sequestration’s potential as an environmental solution. Fact Sheet. Decatur, IL: Archer Daniels Midland Co. http://www.adm.com/en-US/responsibility/Documents/Carbon-Sequestration-Brochure.pdf
2. APS (2011) Direct air capture of CO2 with chemicals. Report. College Park, MD: American Physical Society. www.aps.org/policy/reports/assessments/upload/dac2011.pdf
3. Azar C et al (2010) The feasibility of low CO2 concentration targets and the role of bio-energy with carbon capture and storage (BECCS). Clim Chang 100(1):195–202
4. CARB (2010) Final regulation order: low carbon fuel standard. Sacramento, CA: California Air Resources Board; approved January 12. www.arb.ca.gov/regact/2009/lcfs09/finalfro.pdf
5. Cherubini F et al (2009) Energy- and greenhouse gas-based LCA of biofuel and bioenergy systems: key issues, ranges and recommendations. Resour Conserv Recycl 53(8):434–47