The Best Ways to Use Renewable Energy

Hydroelectric Power (9/13)

The Cachi in Ujarras de Cartago hydroelectric dam in Costa Rica, a country committed to reducing its net greenhouse gas emissions to zero by 2030.
Hydroelectric power is by far the most important source of renewable eneryg worldwide. But while it is cleaner than coal power generation in terms of carbon dioxide emissions, dams can also produce significant levels of methane emissions (another major greenhouse gas) and have a high environmental impact on local habitats and societies. (Photo: Reuters)