The Organization for Economic Co-operation and Development (OECD) is "an international organisation helping governments tackle the economic, social and governance challenges of a globalised economy(... It) groups 30 member countries sharing a commitment to democratic government and the market economy."
See their Environment Pages:
Source: OECD website
Deutsch: Organisation für wirtschaftliche Zusammenarbeit und Entwicklung
Español: Organización para la Cooperación y el Desarrollo Económicos
Français: Organisation de coopération et de développement économiques
Nederlands: De Organisatie voor Economische Samenwerking en Ontwikkeling (OESO)