wind & water

Describes the resurgence of water power, one of the oldest forms of alternative energy, and ways of using water as energy.

Explains how wind is produced and how it can be used as a power source, describing the windmill's history and inner workings, wind turbines, wind farms, wind power pros and cons, wave generators, solar chimneys, and the future of wind energy.

Describes the history, early and modern technology, and advantages and disadvantages of using water power, and includes color photos and diagrams.

Describes wind energy and how it is generated and used. Includes a simple experiment.