materials-energy(solar,biomass,etc.)

Explains how the Sun, which is the ultimate source of all energy on earth, can be used to provide electricity and power.

Discusses how today's modern wind turbines have developed from the windmills of the past and how technology relating to wind power continues to develop.

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

Contains twenty-eight essays in which various authors debate issues related to energy alternatives, discussing whether alternative energy sources are necessary, nuclear power, which alternatives should be pursued, and alternatives to gas-powered cars.