In 1977 the world's first Intergovernmental Conference on Environmental Education, organized by UNESCO in partnership with UNEP was held in Tbilisi, Georgia.
In 1977 the world's first Intergovernmental Conference on Environmental Education, organized by UNESCO in partnership with UNEP was held in Tbilisi, Georgia.
Seules 12% des villes disposent de mesures de la qualité de l'air conformes aux normes de l'OMS