N Related subject areas > N.10 Natural sciences and technology > N.10.01 Earth sciences and environment > N.10.01.04 Pollution and environmental protection > Environmental protection

V Economics > V.12 Environmental and resource economics > V.12.01 Environmental economics > V.12.01.01 Environmental policy > Environmental protection

B Business economics > B.01 Management and business organization > B.01.06 Environmental management > Environmental protection