Combustable Fuels
European Commission - Eurostat

International Energy Agency (IEA)
Refers to fuels that are capable of igniting or burning, i.e. reacting with oxygen to produce a significant rise in temperature. They are combusted directly for the production of electricity and/or heat.

United Nations Economic Commission for Europe (UNECE)
Refers to fuels that are capable of igniting or burning, i.e. reacting with oxygen to produce a significant rise in temperature. They are combusted directly for the production of electricity and/or heat.