Electrical energy; electrical energy from renewable and non-renewable sources; fuels (including motor spirit) and illuminants; fossil fuels; biofuels; peat (fuel); waste as fuel; synthetic gas (fuel); biogas (fuel); bio oil; pyrolysis oil; wood charcoal; aviation fuels; natural gas; coal; biomass fuels; fuel oils; waste-derived fuels; fuels made from renewable raw materials; gases produced from renewable raw materials