From photosynthesis to digestion, living things are making energy all the time! These life processes are amazing, and they happen relatively quickly when compared with the creation of fossil fuels deep underground! Still, fossil fuels are some of the most important energy on Earth, even if burning them can be harmful. In this book, readers encounter all different ways energy is made on Earth, from gas making cars run to wind turbines. Q and A boxes throughout add vocabulary terms and succinct explanations for interesting questions readers may have. Colorful illustrations--including some adorable round guides--correlate with the main text to aid understanding.