Meet the siblings making hydropower that protects ecosystems
Hydropower is the world’s biggest source of renewable energy, generating about 16% of the global electricity supply. And it will continue to play a key role as the world looks to meet net-zero targets, not least of all because, like a battery, it can store massive amounts of energy for later and quickly release it in moments of peak demand. But despite being better for the climate, it’s becoming increasingly clear that renewable energy sources can have a negative impact on the environment. Just 37% of the world’s 246 longest rivers remain free-flowing—without any human-made dams, reservoirs, or other structures controlling how and when the water moves …