English AGROVOC

BT Biofuels
BT Bioenergy
BT Renewable resources
BT Natural resources
BT Fuels
BT Energy sources
RT Agricultural wastes
RT Methane
RT Methane fermentation
(Lao)
   ແກ໊ດຊີວະພາບ
(French)
   Biogaz
(Spanish)
   Biogás