1. Plastics in the UK economy;Biffaward,2003
2. Cramer JEA. Testing Framework for Sustainable Biomass. Final Report from the Project Group “Sustainable Production of Biomass”; 2007. http://www.lowcvp.org.uk/assets/reports/070427-Cramer-FinalReport_EN.pdf.
3. N2O release from agro-biofuel production negates global warming reduction by replacing fossil fuels;Crutzen;Atmospheric Chemistry and Physics Discussions,2007
4. Carbon balances and energy impacts of the management of UK wastes;DEFRA,2006
5. Carbon and sustainability reporting within the renewable transport fuel obligation requirements and guidance;DfT,2008