V Economics > V.12 Environmental and resource economics > V.12.02 Energy economics > V.12.02.01 Energy Policy > Energy mix

W Economic sectors > W.04 Energy and Water Industries > W.04.01 Energy sector > Energy mix

... > B Business economics > B.05 Materials management and logistics > B.05.01 Procurement > Raw materials > Primary energy > Energy mix

... > V Economics > V.12 Environmental and resource economics > V.12.03 Resource economics > Raw materials > Primary energy > Energy mix

P Commodities > P.04 Energy and Water > Primary energy > Energy mix

P Commodities > P.04 Energy and Water > Energy mix