His hypothesis in the second part of the film was laid out by Viktor Krukov, who worked at the mine for several decades. He is convinced that people are affected by the radioactive gas radon, which groundwater washes out of mines. “The most important thing is the inert gas, which consists of 85% nitrogen and 15% carbon. There is no oxygen in it, and oxygen feeds our blood and, first of all, the brain. A person simply loses consciousness,” says a local resident.>>

What do these people smoke? Not the textbooks are sure.