2. The Nile is being drained to such a degree, it is endangered."
neither of which has anything to do with anything either you or Sam are posting about.
Desertification and Climate change are fascinating topics but have absolutely nothing to do with How the Gizamids were constructed.
I do believe however that both could very well have been part of the impetus towards Pyramid construction.
But you don't seem to be interested in the WHY.