... > V Economics > V.12 Environmental and resource economics > V.12.03 Resource economics > Natural resources > Water > Wastewater

... > N Related subject areas > N.10 Natural sciences and technology > N.10.01 Earth sciences and environment > N.10.01.03 Environment and ecology > Natural resources > Water > Wastewater

... > N Related subject areas > N.10 Natural sciences and technology > N.10.01 Earth sciences and environment > N.10.01.03 Environment and ecology > Water > Wastewater

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

W Economic sectors > W.04 Energy and Water Industries > W.04.02 Water Industry > W.04.02.01 Wastewater sector > Wastewater