Fossil-fuel cars emit poisonous gases, but the only thing that comes from the tailpipe of a car powered by a hydrogen fuel cell is water. This book shows how these fuel cells work, how they came to be, and how they are coming into wider use. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards.