Environmental taxes 2 Taxation 2 emission control 2 environmental tax 2 pollution tax 2 Air pollution control 1 Air quality 1 Air quality modeling 1 Atmospheric emission 1 Atmospheric movements 1 Atmospheric transport 1 Carbon tax 1 Cleaner technologies 1 Collaboration 1 Commerce 1 Conflict 1 Cost effectiveness 1 Cost sharing mechanism 1 Emission tax 1 Environmental group 1 Environmental groups 1 Environmental policy 1 Environmental protection 1 Environmental quality 1 Environmental regulations 1 Environmental responsibility 1 Environmental tax 1 Green alliances 1 Health risks 1 Integrated environment 1