e Environment (Cambridge unw. Press. New Yak, 2004/ 8. N. S. Lewis. D. G. Noses. Pre. Holt Arad. Sci. USA 103. 15729 (2006). 9. M. S. orenethair. I. L. Thomas. Nature 414. 332 (2001). 10.112Edscience.1140362 PERSPECTIVE Toward Cost-Effective Solar Energy Use Nathan 5. Lewis At present, solar energy c