 As the 239Pu/240Pu ratio only changed slightly during the Trinity detonation, it has been commented that this isotope ratio for the majority of atomic bombs (in Japan the 239Pu/240Pu ratio in soil is normally in the range 0.17 to 0.19) is very different than from the bomb dropped upon Nagasaki.Plutonium has also been released into the environment in "safety trials".In these experiments, nuclear bombs have been subjected to simulated accidents or detonated with an abnormal initiation of their chemical explosives.