This is not showing the scale of solar panels we need in the United States to supply all of our power. It does not mean that we are going to place that many panels all together (although it would be a great sight!).

One major factor to take into consideration is transporting the electricity. So much electricity is lost in transmission that it is much more economically feasible to install solar on roof-tops. Also, we need a way to store energy (solar is no good at night) or install solar-thermal electricity because it can continue to generate electricity hours after the sun goes down.