Global warming could release toxic substances from the permafrost.

The permafrost stores pollutants from the petrochemical industry - gasoline, diesel, as well as lead, mercury and arsenic. There you can also find radioactive waste from nuclear tests. This is not an exhaustive list, because many data about the infrastructure in permafrost regions are classified or inaccessible to scientists. According to rough estimates, 13-20 thousand points can be noted on the map of the Arctic, where military-industrial waste is buried. They were not disposed of in an environmentally friendly way, because it was believed that in the permafrost, garbage would be safely stored for centuries.