The porous border portion in Arizona should be secured with a large berm with solar panels covering the sunny side to charge electric-self-driving patrol cars moving along the top. If one wants double security one could build a pair of canals behind the berm. One would carry salt water piped up with solar powered pumps from the Gulf of California/Sea of Cortez to New Mexico and the continental divide where the salt would be removed through condensation and capture under clear polycarbonate roof panels shaped to collect the water and let it flow to micro-canals on the sides where it is further directed in pipes to the fresh water canal that is underground.
Congress needs to return to the practice of multi-purpose constructs that get more value for the buck and actually improve matters physically when they are invested in and built. The southwest could use more freshwater.
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