Obviously, Americans are not that aware that sun spots make the sun hotter then colder in 22 year cycles. We are experiencing a period when the sun is not as warm as we would expect. The cooling of the sun is temporary, but one has to be sophisticated to understand global warming as a result of too much CO2 from fossil fuel use and the long term greenhouse effect that is irreversible!
If we can rely on the sun alone for energy, we have a good way to achieve sustainability!