Which explains why the eastern US is nuclear wasteland after all the nukes we set off in the Nevada Desert*.
* 1,021 nuke detonations. 921 below ground.
Yah, or Hiroshima/Nagasaki are wastelands that put Detroit to shame...
Although to be fair, the isotope spread from a nuclear reactor vs. a fission or fission/fusion or fission/fusion-enhanced fission bomb, and the half-lives are probably a bit different. Granted, while the Chernobyl exclusion zone isn't all peaches and cream, the removal of human activity/impact from the region seems to balance out the damage done by the radiation in many instances.
Although I suppose part of it is the relatively short lifespans of many wild animals is such that the exposure doesn't have time to add up like it might in humans, and the effects isotope concentrations as they migrate and concentrate up food chains could start rearing it's head in future years.