1. Schmidheiny, S. with the Business Council for Sustainable Development. (1992) ‘Changing Course: A Global Business Perspective on Development and the Environment’, MIT Press
2. Total Material Requirement of the European Union, Technical Report No. 55;Bringezu,2001
3. Environmental Signals 2001’, Office for Official Publications of the European Communities,2001
4. Inter-Governmental Panel on Climate Change. (2001) ‘Climate Change 2001: The Scientific Basis’, Summary for Policymakers—A Report of Working Group I of the Intergovernmental Panel on Climate Change, IPCC 3rd Assessment Report
5. UK Energy Sector Indicators,2000