Includes bibliographical references and index.

"Modern transportation lets us travel farther and faster than ever before, but these developments have come at a cost. This book explores ways we can move around without harming the planet. Case studies show how scientists are working on cleaner fuels and new forms of transportation in order to prevent pollution, which affects people's health, and greenhouse gases, which contribute to climate change. Find out how we can contribute by changing our own transportation habits"-- Provided by publisher.

Ages 9-12 Crabtree Publishing Company.

Grades 4-6 Crabtree Publishing Company.