Hydropower is renewable energy because it harnesses the continuous water cycle, where evaporation, precipitation, and runoff naturally replenish the resource without depleting it over time. Unlike fossil fuels that form over millions of years and vanish once burned, rivers flow season after season, making hydroelectric generation fundamentally inexhaustible under stable climatic conditions.
This classification matters because hydropower supplies roughly 16% of global electricity in 2026, representing humanity’s largest source of renewable power by total output. Yet the question persists in public discourse, fueled by …










