Home > Other > Powering the Future: A Scientist's Guide to Energy Independence > Page 40 Powering the Future: A Scientist's Guide to Energy Independence Page 40 by Daniel B. Botkin X-Y-Z Xcel Energy Corporation, 207-208 Yucca Mountain, Nevada, 86, 100 zero-energy house, 230 Zond, 128 ‹ Prev Next ›