Hydropower accounts for at least 80% of electricity generation in the Congo, Ethiopia, Mozambique, Uganda and Zambia.
Africans have invested in hydropower but drought makes it risky, and a new study from Italy finds solar and wind are a better bet.
For nearly 20 years, activists sought to protect Ecuador's rainforest and its people from oil extraction. On Sunday, they won.
The process of purifying contaminated water known as water remediation can be powered entirely by solar power.
As climate change makes extreme rainfall more common, it will further test flood-fighting capabilities.
EVs are better than traditional vehicles, but they have hidden costs of their own.