So how do we correct this? I ask because we have a strong push for nuclear as a cleaner energy source, but we know energy providers have a spotty history with safety. If we're going to take this route then we should have some reliable plans in place to decontaminate when the need arises.
Well, as the article points out, one of the biggest causes of the radioactivity is from nuclear weapons testing 60-80 years ago. We already stopped that so that bit is taken care of. It will just take a lot more time for the radioactivity to decay down.
The article is really poor though. The title says it’s because of Chernobyl, but the study actually found that it was weapons testing more than Chernobyl.