Profiles the systems that work together to keep urban areas running safely, discussing how cities have evolved since the first riverside settlements while outlining projects that explain facts...
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Author: Reilly, Kathleen M.Summary: -
Author: Reilly, Kathleen M.Summary:Introduces readers to the history and science behind the world's energy sources, including petroleum, natural gas, wind, hydropower, solar, and geothermal, through hands-on projects using common...
Genre: Math and science, Juvenile nonfiction