1. Biomass energy versus carbon sinks: trees and the kyoto protocol;Hall;Environment,1999
2. European Commission. Energy for the future: renewable sources of energy. COM(96)576, Brussels, 1996.
3. European Parliament and Council. Directive 2001/77/EC on the promotion of electricity produced from renewable energy sources in the internal electricity market. Directive 2001/77/EC, Brussels, 2001.
4. IEA statistics—Renewables information 2003,2003
5. European Parliament and Council. Directive 2003/30/EC on the promotion and use of biofuels or other renewable fuels for transport. Brussels, 2003.