Hydropower still remains the largest source of renewable energy. But in Europe, dams are dismantled en masse. Migratory fish species return to them, entire ecosystems get a second chance. Why is it better to remove some dams? Watch the video.

Hydropower still remains the largest source of renewable energy. But in Europe, dams are dismantled en masse. Migratory fish species return to them, entire ecosystems get a second chance. Why is it better to remove some dams? Watch the video.