> The nuclear solution has been there this whole time.
Yes, but it's more subtle than that.
Despite the naysayers, and those that don't accept science and fact, nuclear, is clean, is safe, and is available right now. Deaths due to nuclear power station (construction, accidents,
Amongst the many problems with uranium-based nuclear power is: government legislation and control, government obsession with also producing weapons grade fuel, preventing other countries (Iran, North Korea) from having it, and lastly cost, as a consequence of all of these things.
And because of the weapons grade part, and other reasons, thorium has never been pursued. But China is, https://www.livescience.com/china-creates-new-thorium-reacto..., and it seems like the West is going to be in China's pocket again, if it is successful.
As for fusion. That's still 30 years away as usual.