One of the issues involving nuclear power has been what to do with the waste materials. What if there was a way to not only convert the problematic materials into a safer storage form, but also enable that same storage form to be used as fuel in newer nuclear power generators? Sounds to good to be true, doesn't it?
That may have changed:
https://phys.org/news/2020-05-reveals-single-step-strategy-recycling-nuclear.html [phys.org]
I would prefer more 'green' sources of energy production, but this is something that may be useful to help that along, making coal and petroleum energy production a part of history.