This lecture discusses the environmental challenges faced by African cities, focusing on waste management strategies. Topics include the lack of knowledge about waste generation, the importance of consolidating pre-collection processes, the coordination between different stakeholders, and the need for tailored interventions. Emphasis is placed on the complementary roles of various stages in waste management, such as pre-collection, collection, and treatment. The instructor also highlights the significance of formalizing waste management approaches, professionalizing small operators, and planning interventions effectively to achieve sustainable development goals.