Uranium extraction from seawater looks quite promising. I spoke with some researchers a few years back that were able to demonstrate the ability to produce yel

Uranium extraction from seawater looks quite promising. I spoke with some researchers a few years back that were able to demonstrate the ability to produce yellowcake at $200/lb. The current market price is $70/lb, but the actual cost of the uranium is such a small piece of the pie that paying 3x for a domestic, non-mining source makes sense. The initial research was done in rather cold seawater, but they did demonstrate that the process was faster with warm water. Last I heard, they were working on testing the viability of post-filtering hot brine from desalination plants, which should be much more efficent.