[formerkrogemp]

> They farm where there is water: rivers, lakes, flood planes, deltas, etc. It is the cities diverting the water from these places.

What do you call a place where the lakes, rivers, flood planes, and deltas are dried up? That's right. A desert. If current trends continue that's exactly what you're going to have.

[kolanos]

> What do you call a place where the lakes, rivers, flood planes, and deltas are dried up?

I think you mean diverted. Cities are actively draining reservoirs, too.

[pm90]

No they are not, not at the same scale as ag.