There may be many good reasons why countries should negotiate common minimum rules for the taxation of areas such as energy consumption - concern for the environment, as well as concern for fair competition between countries - in various international forums such as the UN, the Council of Europe, the OECD, the WTO and so on.
Possono esserci diversi buoni motivi per definire regole minime comuni in materia di tassazione del consumo energetico in diversi contesti internazionali, come l' ONU, il Consiglio d' Europa, l' OCSE, l' OMC e via dicendo, dalle considerazioni ambientali ai principi della concorrenza tra i diversi paesi.