Soviet Nuclear Development
Nuclear weapons development in the former Soviet Union was conducted in the well-guarded "closed cities" of nuclear weapons producution complexs, which were not even shown on the map. The administration of these nuclear facilities was conducted in such a slovenly way that radioactive waste was discharged into nearby rivers, or that a nuclear waste storage tank exploded("Ural Nuclear Disaster" in 1957, where 120,000 people were exposed to radistion). They dumped massive nuclear waste into a lake until it dried up and radioactivity was scattered in the air.
A large amount of nuclear waste was discarged into the Techa River Chelyabinsk, Russia. Although the river has now been made off-limits, with fences along the banks, cattle drink the water from the river, stock that will eventually be the food of the local people.