Abandoned in 1200AD or so. Perhaps you can enlighten us as to how much fossil fuel they were using to cause this climate change induced abandonment? Or maybe you are just confused. Anyone trying to cite The Pope is not too bright. These were not Catholics and nor were the Egyptians and Incas but at least they thought the Sun had something to do with it and prayed to their Sun gods or sacrificed people. They had a lot more of a clue then you and the Pope.
Even Greta coming into adulthood has now withdrawn her embarrassing texts. But you still think they are valid. She had the excuse of brainwashed uneducated youth. You don't.
