I've heard of desertification, where farmers (people) have literally exhausted soil to the point of it turning into a desert, but my question is, can humans take back the desert, like the Sahara and make it fertile?

Sure. Add water and enrich the sand into fertile soil.

Ah Wondergirl? I didn't know that... However, I guess that much much water will be required.

You're going to fix the entire desert, unknown?

No, I was just inquiring! :D (btw, you can call me unky, as the others do, for they find unknown somewhat long.. )

No, I was just inquiring! :D (btw, you can call me unky, as the others do, for they find unknown somewhat long..)
I don't know you well enough to call you by a nickname. Good thing I type fast...

Ok... I've seen quite a few of your posts though. Ok, never mind.