Turning egypt into desert wasn’t caused by human factor, it was caused by change of earth axial rotation nature.com/…/green-sahara-african-humid-periods-p… and it happened within less than 2-3 centuries. Far more drastic than what we see alleged by “human greenhouse gas emissions”. It’s all well documented that natural causes can be far more drastic than whatever we do on earth ( several degrees in global earth scale ). And no, climatology is not united around the greenhouse gas effect at least not about alleged scale