. . "Juvenile works"@en . "Solar Power" . . . . . "Describes the use of solar power since early times, the science which explains how solar power works, and its advantages and disadvantages."@en . "Describes the use of solar power since early times, the science which explains how solar power works, and its advantages and disadvantages." . . . . "Describes the use of solar power since early times, the science which explains how solar power works and its advantages and disadvantages. Includes a simple experiment."@en . . . . "Solar power"@en . "Juvenile works" . "Solar power" .