Alternative Energy Sources

The environmental movement emphasizes sustainability of energy use and development. Renewable energy is sustainable in its production; the available supply will not be diminished for the foreseeable future - millions or billions of years. "Sustainability" also refers to the ability of the environment to cope with waste products, especially air pollution. Sources which have no direct waste products (such as wind, solar, and hydropower) are seen as ideal in this regard.

Energy conservation is an alternative or complementary process to energy development. It reduces the demand for energy by using it more efficiently. Read more..

Click here to see some of the most promising technologies working towards a "Sustainable Earth".