Just want to point out that you also need to figure in operating and maintenance costs, and cost of capital. If you invest a trillion dollars, you need to generate at least $50B-ish per year just to cover the interest on the loan. You ain't gonna make $50-B-ish per yera on a milliwatt. You also need to consider opportunity cost. If you took that trillion and invested in gas fired turbine plants, you'd get back your investment....