Translate the following English sentence to French:
"Hydroelectric power in the Nordic countries is an environmentally friendly and natural energy source that can often be produced at a competitive price, as is the case at present, thanks to a good water supply."
L'énergie hydraulique des pays nordiques est une source d'énergie naturelle, respectueuse de l'environnement et peu chère en raison des bonnes conditions de l'eau.