With easy-to-read text, full-color photos, and captivating graphics, this book examines the background, pros and cons, and future of solar, hydro, wind, and geothermal power. Advanced technologies, such as photovoltaic cells, wave and tidal machines, and geothermal heat pumps, are simplified for basic comprehension. A colorful diagram of a geothermal heating system teaches readers how geothermal energy is used to heat homes. Environmental and economic concerns regarding dams, wind turbines, and offshore wind farms are also addressed. Other environmental topics introduced include greenhouse gases, global warming, and pollution. Informative sidebars, bold glossary terms, and an index accompany engaging text and interactive graphic elements.