The changing role of hydro power: Challenges and opportunities Hydro power is a renewable energy source that has been a key contributor to the global energy mix for decades. However, as the world shifts towards a more sustainable energy future, hydro power is facing new challenges and opportunities. This report highlights some of the key issues facing hydro power, including the impact of climate change on water availability and the need for more sustainable and efficient dam operations. It also explores the potential for hydro power to play a larger role in the energy transition, including through the integration of storage and flexible generation. Overall, the report underscores the importance of continued investment in hydro power and the need for innovative solutions to address the challenges facing this important energy source.