Table of Contents

13 August 2004
Vol 305, Issue 5686

About The Cover

Cover image expansion

COVER Policymakers around the world are calling for major energy-consuming nations to move from reliance on fossil fuels to an energy economy mediated by hydrogen. A special section starting on page 957 assesses the prospects for such a transition and describes technological developments necessary for making it a reality. [Image: Stephen R. Wagner]