While I agree with you that it's virtually impossible for humans to use up the uranium in sea water at our current energy consumption rate, I think it's worth t

While I agree with you that it's virtually impossible for humans to use up the uranium in sea water at our current energy consumption rate, I think it's worth thinking about that if we had "unlimited" energy, we might use orders of magnitude more of it than we currently do. That being said, for that to be an issue, we'd have to increase our energy consumption at least 1000x, and if we get to the point of using that much energy, it seems likely we'll also have advanced technologically to such an extent that we'll figure out another solution. It's just an interesting exercise to consider how what seems impossible today, might be totally routine in 10/100/1000 years.