Table of Contents

13 August 2010
Vol 329, Issue 5993

About The Cover

Cover image expansion

COVER A large-scale algae growing system. Oil extraction from algae is one approach being actively explored to replace petroleum as an energy source. A special section beginning on page 779 highlights worldwide research efforts aimed at scaling up this and other carbon-neutral processes to generate cleaner power. Photo: Ashley Cooper/Visuals Unlimited, Inc.