As the human population increases and technology advances, new solutions are being found for the problems caused by our growing need for energy. While some people continue to believe fossil fuels are the best source of energy, others have begun to use renewable energy sources that are better for the environment. Through the accessible and age-appropriate main text, readers are introduced to renewable energy sources, such as solar power, wind power, and geothermal power. Engaging fact boxes and a helpful glossary provide additional information, while full-color photographs enhance the reading experience.