FEMA lists three types of disasters. Which of the following is NOT one of them?

FEMA (Federal Emergency Management Agency) categorizes disasters into three primary types: natural, technological, and national security. Natural disasters encompass events such as hurricanes, floods, earthquakes, and wildfires, while technological disasters refer to events resulting from human actions, including industrial accidents and nuclear incidents. National security threats involve situations that can affect the safety and security of the nation, such as terrorism or warfare.

The option labeled as "Environmental" does not correspond to one of the recognized disaster categories by FEMA. Although environmental issues can lead to disasters and can be associated with natural disasters, they are not classified as a standalone type. Such issues might impact health or ecosystems but do not fit into FEMA’s specific categorization of disasters relevant for emergency management and response.

Thus, the answer appropriately identifies "Environmental" as not being one of the types of disasters recognized by FEMA.