Cl100 is an absolute lethal concentration for any person; at the moment it is a pure gas that contains a lethal dose of poison. In 2035, an unexpected accident occurred, due to which the creation of cl100 gas was carried out; it was previously used as a weapon of mass destruction and destruction of people, and then banned. The concentration itself, at the time of its discovery, was prohibitive; it caused a certain cataclysm, the cause of which was an error during development. And when the concentration was studied more carefully, its properties were discovered: non-compressibility (gas), explosiveness, toxicity and chemical hazard. This type of deadly gas was included in the book of records as the most dangerous thing in the world, since its dosage is so dangerous that it is not possible to remove the toxic poison. Suffocation from lethal concentration is the most effective type. As mentioned earlier, gas was first used