Nuclear energy is sustainable only with technology we don't have yet. All the affordable reactor designs with no risk of accidents or proliferation are just 10 years away like they have been for four decades.
And the sea water plan relies on technology that has been shown to be theoretically possible but not yet shown to be remotely feasible. At the proposed scale of kilotons per year, this would require filtering hundreds of billions of tons of sea water every year, even if we disregard the fact that most seawater isn't easily accesible.
But the problem nuclear is that either way, it's far too late. Even if we managed to build nuclear reactors faster than at any other time in history, we would be far too late to stop climate change.
And the sea water plan relies on technology that has been shown to be theoretically possible but not yet shown to be remotely feasible. At the proposed scale of kilotons per year, this would require filtering hundreds of billions of tons of sea water every year, even if we disregard the fact that most seawater isn't easily accesible.
But the problem nuclear is that either way, it's far too late. Even if we managed to build nuclear reactors faster than at any other time in history, we would be far too late to stop climate change.