Many machines burn fossil fuels for power, which pollutes our air and leads to climate change. What if we used solar, wind, or hydropower instead? Conversational questions and answers guide early elementary readers on a critical thinking journey with accessible text about the different kinds of clean energy, how they are being used today, and how they could be used in the future. Colorful and engaging infographics help visual learners understand new concepts. A "Stay Curious!" feature encourages kids to keep asking questions while doubling as a mini media literacy lesson on research skills. Includes table of contents, glossary, and index.