What did you expect -- enlightenment?
If we are lucky this is cyclical but that does not matter if we perish during the cycle. The Sphinx raises questions about cycles of civilization.
"Humanity's 'Lost Civilizations'" by I. M. Oderberg
Maybe, it's a bunch of conjecture and bullshit?
It has been warm here too. Reducing mans carbon footprint makes sense but more for other reasons such as clean air and a livable environment.
There is a new development of catalytic and photovoltaic conversion of CO2 into ethanol -- a fuel that burns relatively clean into steam and CO2 that can be reused -- perpetual motion. This would make CO2 recycling a better alternative (if it can be scaled out). This also might allow chemical storage of electricity from sunlight that could be burned during the dark hours changed back into electricity and sent into the grid.
Technology will guarantee America's greatness not reverting back to some embellished past glory. A Luddite fantasy from a bygone era -- or the theological scientific explanation of the above picture.