IGWE, Peter. Millennium Development Goals: A Review of Achievement of Ensuring Environmental Sustainability . coou African Journal of Environmental Research, [S. l.], v. 1, n. 1, p. 58–67, 2018. Disponível em: http://ajer.coou.edu.ng/index.php/journal/article/view/5. Acesso em: 7 may. 2024.