TY - BOOK AU - Pimentel,David TI - Biofuels, solar and wind as renewable energy systems: Benefits and risks SN - 9781402086533 (hardcover) U1 - 621.042 20 PY - 2008/// CY - New York PB - Springer KW - Renewable energy sources N1 - Includes Index; Includes bibliographical references and index ER -