Green roofs are an urban oasis in a patchwork of black tar and silver rooftops, but what exactly are they?This beautifully illustrated picture book is a perfect introduction to green roofs for children- and their adults. From the ancient Hanging Gardens of Babylon to present-day rooftop farms, green roofs have been built for centuries. They are receiving new attention because of the environmental benefits they offer, and the additional value of 'greening' typically neglected spaces. This book is packed with charming, informative illustrations and facts that provide everything you need to know about green roofs and why they help combat climate change. Also included is a glossary of green roof vocabulary and educational resources. Reading Level M-P or Grades K-3. This book is a great read-aloud book for families and classrooms.