Another solution exists, I don't think I'm the only one who thought of it. There are natural thermal vents in Northern California that are used for power generation. The power plants were built by PG&E, but the utility was forced to sell it off to an independent power supplier company by the Public Utilities Commission. My wife, when she worked at PG&E, had to visit that site, and told me it stunk of sulfur but it was free energy. That plant supplies most of the electricity to Northern California just north of SF.
So why can't this natural steam coming out of the ground, be used for heating polluted water in order to condense out clean drinking water, as well as generating electricity? Polluted or sea water can be pumped in pipes to the site, and clean water can be pumped out to other destinations. Why use the sun, when you have a natural hot water source from below ground that operates around the clock?
I dunno. Sounds good to me.