Carbon dioxide -- Environmental aspects Carbon dioxide -- Environmental aspects -- European Union countries Environmental impact charges Environmental impact charges -- European Union countries Environmental policy -- Economic aspects Environmental policy -- European Union countries Environmental protection -- Taxation Environmental protection -- Taxation -- European Union countries Europäische Union. Mitgliedsstaaten Kohlendioxidemission Steuer Umwelt Umweltpolitik Umweltschutz Umweltsteuer Umweltökonomie