SDG&E has stated that the line is intended to carry renewable energy generated by the sun, wind and geothermal sources. In its 4-1 decision to approve the line, the CPUC stated that the Sunrise Powerlink will facilitate the development of Imperial Valley renewable energy projects capable of generating 1,900 megawatts of clean power. The decision further stated that this renewable energy would likely remain unavailable to San Diego without a new, secure transmission line. However, in a dissenting opinion, CPUC Commissioner Dian Grueneich stated that the application should be denied for the following reasons: (1) It is not needed to meet SDG&E's renewable portfolio standard (RPS)obligation of 20% by 2010;(2) Assuming a 20% RPS, it is not economic and will potentially generate significant ratepayer costs; (3) It will have many significant and unmitigable impacts on the environment; and (4) Other alternatives will meet SDG&E's eventual reliability needs more economically and with fewer significant and unmitigable impacts on the environment.