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.
Apenas 12% das cidades tem níveis de qualidade do ar compatíveis aos padrões de qualidade da OMS.