It has been in the absence of human life for the last 25 years that existing animal populations have returned to the surrounding areas. While measuring the scale and scope of this biodiversity is difficult, as the region is still radioactive enough to pose a danger to humans, there are natural indicators of the radiation's effect. One of these indicators is the large presence of wolves found in the exclusion zone. Because wolves are apex predators, they are useful for evaluating other forms of wildlife. The presence of a pack of wolves means that a "prey" species is present, in this case the deer. The documentary Radioactive Wolves of Chernobyl conducted a study that suggests that the number of wolves inhabiting Chernobyl is the same as those found in a clean test environment. While the area remains dangerous for humans, the presence of native wildlife in the region suggests that humans will one day be able to live safely in the homes of their ancestors. The profound dangers witnessed after Chernobyl have led to a change in the perception of the safety of nuclear energy by a variety of geopolitical organizations. After the accident, the World Association of Nuclear Operators (WANO) was founded in 1989. This organization has connected over 130 nuclear power plant operators in more than 30 countries. They spent almost 1