Can you mine uranium from seawater?

Evidently, you can.  But it isn't worth the effort.

It probably hasn't occurred to policy makers, that you can get 100 times what you are already using and you wouldn't have to mine anything.

How can you do this?  Run the radioactive wastes through a molten-salt reactor.  You see, conventional reactors only burn 1% of the fuel.  One hundred times 1% equals 100%.  That's just for one year.  The radioactive waste has been collecting for 40 years since Jimmy Carter stopped reprocessing of radioactive waste.  There may be enough for hundreds of years by this method, and you wouldn't have to mine anything at all.

You can stretch out these supplies by using thorium, which exists in such abundance that we'll never run out of the stuff.

Trouble is, the enviros have everybody so afraid of radioactivity, that we can't do this.