Thirst

Here is a revealing look at the desertification of Iraq:

https://www.globalresearch.ca/demise-mesopotamia-geopolitics-behind-desertification-iraq/5775765

In reality, much of what we call "climate change" is driven by growing, developing human populations which are stealing water resources which used to belong to someone else.

So yes, much of it is caused by humanity, but not in the way it is usually portrayed.