Desalination only really makes sense with a surplus of energy. Driving desalination with the cooling system of a nuclear power plant would make sense, as it's o

Desalination only really makes sense with a surplus of energy. Driving desalination with the cooling system of a nuclear power plant would make sense, as it's otherwise wasted energy. But that's not popular in California, so that leaves other options like osmosis membranes that require energy.