A population boom in Senegal is intensifying pressure on scarce water resources in its semi-arid capital of five million people, with problems set to increase over the coming decades.
Plagued by plastic pollution, Senegal wants to replace pickers at the garbage dump with a formal recycling system that takes advantage of the new market for plastics.
Jinja City in Uganda is the latest city in sub-Saharan Africa to embrace the cost savings and environmental benefits of solar-powered street illumination.