1) That is a pretty huge cost when wholesale cost of solar is only a few cents to begin with.
2) That equation ignores the time value of money, which is absolutely relevant. A dollar spent today is not the same as a dollar saved 100 years from now.
2) That equation ignores the time value of money, which is absolutely relevant. A dollar spent today is not the same as a dollar saved 100 years from now.
And if you have skyscrapers you have lots of side surface area to capture solar energy as well
2 is fair.