At $130/kg, there’s enough for 80 years at current consumption (about 10 years if we use it for all our electricity), but if we’re willing to use ore with a tenth as much uranium, there’s 300 times as much. Also, there’s ways of using uranium 238, which is about 140 times as abundant. It’s still a temporary patch, in the sense that we can’t just keep using it until the sun goes out, but it will last long enough for fusion power to become economically feasible.
Nuclear’s hardly sustainable long-term though. It’s a temporary patch that might help for fifty years or so.
At $130/kg, there’s enough for 80 years at current consumption (about 10 years if we use it for all our electricity), but if we’re willing to use ore with a tenth as much uranium, there’s 300 times as much. Also, there’s ways of using uranium 238, which is about 140 times as abundant. It’s still a temporary patch, in the sense that we can’t just keep using it until the sun goes out, but it will last long enough for fusion power to become economically feasible.
And thorium.