Hydroelectric projects are popular in developing countries. They are clean, renewable sources of energy. But building dams also means flooding valleys and destroying the homes and livelihoods of local people. In Indonesia, a pioneering program is turning this notion on its head, transforming new lakes into lucrative sources of income, and allowing displaced former farmers to become successful fishermen.

One third of the world's population doesn't have access to electricity. The Solar Electric Light Fund (SELF) is helping remote rural communities to harness the power of the sun to give them safe, cheap energy to power lighting, medical refrigerators, and modern communications devices.