Learn about the history of hydroelectric power and how water power is used to generate electricity.

Explains how humans have used water as a power source in the past, and how we are working to expand that capacity.

'We are experiencing the beginning of an energy revolution in these early years of the 21st century.' Water, Energy, and Environment - A Primer provides an introduction to, and explanation of, this revolution.

"This publication, the sixth in this series issued by the Federal Power Commission, presents data as of January 1, 1972, on the capacity, generation, and other characteristics of the developed and undeveloped hydroelectric power resources of the United States. Principal statistics are shown by major drainages and river basins and by geographic divisions and States"--Page iii.