"ENVIRONMENTAL POLICY." . . . . "INDUSTRIAL POLLUTION." . . "Organisation for Economic Co-operation and Development." . . "Energiequelle." . . "ENVIRONMENTAL QUALITY." . . "Erneuerbare Energien." . . "ENERGY RESOURCES." . . . . . . . . . . . . . . . . . . . . . "Environmentally favourable energy options and their implementation" . . "Environmentally favourable energy options and their implementation"@en . . . . . . . . . . . . . . . . . . . . . . . "OECD" . . "OECD." . "Umweltschutz." . .