Cloud Mummies v.16
Until someone figures out a way to manufacture antimatter, fusion is by far the cleanest and most abundant source of power we can hope to harvest. We’ve known this for a long time, but fusion is hard, and it’s expensive to build the giant lasers or toroidal plasma containment systems that are needed to get it to work. By most estimates, we’re something like 40 years away from an operational fusion power plant.
“Most estimates” do not, apparently, include research being done at Lockheed Martin’s secretive advanced development center, Skunk Works.