Download or read book A Leaf in Time written by David Walker and published by Cold Spring Harbor Laboratory Press. This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering energy, plants and people, this book explains how almost all of our energy comes from the sun. It describes the process by which humans turn fuels and food into carbon dioxide to release energy, yet green leaves do exactly the opposite. The process of photosynthesis is explained in an easy-to-understand way, and children learn how plants turn light into electrical energy and use it to convert carbon dioxide and water into food.