The UN study which said that moles will tip Stonehenge over, also says that Mesa Verde (which was abandoned in the 13th century due to drought) will be destroyed by heat, fires and drought.
The area isn’t getting hotter.
The area isn’t getting drier.
Past droughts were much worse, like the ones which caused Mesa Verde to be abandoned.
Forest fires are down 80% from 80 years ago.
Forest fires are down 90% from the pre-industrial period.
The UN and Union of Concerned Scientists simply made everything up. There is no science behind their work, just propaganda intended to frighten people.