@Npars01 @petergleick

4/

...
"the first one started some 5,000 years ago when the unification of Upper and #LowerEgypt occurred and the Uruk Kingdom in modern Iraq collapsed.

The second event, some 3,000 years ago, took place in the eastern Mediterranean and is associated with the fall of the #Ugarit Kingdom and famines in the #Babylonian and #Syrian Kingdoms."

Back then, there were not many people on the planet.

I think, green energy by itself will not solve our problems...