(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) "hernieuwbare energiebronnen": hernieuwbare niet-fossiele energiebronnen (wind, zonne-energie, aardwarmte, golfenergie, getijdenenergie, waterkracht, biomassa, stortgas, rioolwaterzuiveringsgas en biogas);