I have a simple solution for Texas, with known technology, that could turn most of the State green and keep it green even if it never rained again. And it’s all based on just one thing. The Gulf Coast.
The Gulf Coast has a vast amount of water, albeit salt water. But underneath the Gulf Coast is an enormous amount of natural gas.
Put those two things together and you have desalinization. Fresh water in vast amounts.
So build natural gas powered desalinization plants and pipelines to ship the water inland. Such plants can run year around, and during wetter seasons can fill reservoirs. And when those reservoirs are filled, use electricity generated from natural gas to pipe the water to ever deeper inland reservoirs.
Certainly it will be expensive, but it will turn big sections of desert Texas green with farmland and water using industry.
So buildnatural gasnuclear powered desalinization plants and pipelines to ship the water inland.
And when those reservoirs are filled, use electricity generated fromnatural gasuranium topipe the water to ever deeper inland reservoirspower hydroelectric generation.
Texas isn't always in a drought, but it always gets insanely hot in the summer - and since Texas is drawing people from all over the planet to live and work here, we can't possibly keep up with the growing electricity needs.
Geothermal heat sinking, while capital intensive, is a good way to go.