(a) "renewable energy sources" shall mean renewable non-fossil energy sources (wind, solar, geothermal, wave, tidal, hydropower, biomass, landfill gas, sewage treatment plant gas and biogases);
a) "erneuerbare Energiequellen": erneuerbare nichtfossile Energiequellen (Wind, Sonne, Erdwärme, Wellen- und Gezeitenenergie, Wasserkraft, Biomasse, Deponiegas, Klärgas und Biogas);