I could see nuclear powered hydrogen generators yeah. Batteries do have some dirty components but they are finding ways around them. And lithium may someday be sourced more cleanly, and if we’re dreaming , from seawater . I’m excited about lithium - sulfur (that’s still in the lab ). But right now they are already starting to build iron batteries and iron salt flow batteries for grid scale storage , and if they live up to the hype I could see wind/solar finally scale up to base load.