In the Antarctic Treaty System, the choice that is not mentioned is:
B. Ozone layer
The Antarctic Treaty System focuses on promoting scientific research, protecting the environment, and ensuring peaceful cooperation in Antarctica. While issues like nuclear testing, mineral resources, and tourism activities are addressed within the treaty system, the ozone layer specifically is not mentioned as a focal point in the agreements related to Antarctica. This omission does not mean that the ozone layer is not important; rather, it indicates that the treaty system primarily emphasizes other aspects of environmental protection and international collaboration in the region.
