Seawater is full of far more uranium than we can mine from the ground, and specialised sponges could let us harvest it to use in nuclear power plants
Source:
https://www.newscientist.com/article/2202327-artificial-sponges-could-pull-uranium-from-seawater-for-nuclear-power/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home