Chernobyl radiation levels spike as forest fires rage
https://www.cnn.com/2020/04/06/europe/chernobyl-fire-radiation-scli-intl-scn/index.html
"....the maximum allowable amount of natural background radiation is 0.5 μSv/h, the emergency services said, but Firsov's reported amount was nearly five times that."
so when "nature" exceeds 0.5, who gets the violation?