Here's a breakdown:
Intentional Threats:
* Biological: This category refers to the use of biological agents (e.g., viruses, bacteria, toxins) to cause harm, often referred to as bioterrorism.
* Chemical: These threats involve the use of chemical agents (e.g., poisons, nerve agents, explosives) to harm individuals or infrastructure.
* Radiological: This category includes the deliberate use of radioactive materials to cause harm, such as the dispersal of radioactive isotopes or the detonation of a radiological weapon (dirty bomb).
Unintentional Contamination Hazards:
* Biological: These hazards can arise from accidental releases of pathogens, improper handling of biological materials, or the spread of infectious diseases.
* Chemical: Unintentional chemical hazards can occur due to spills, leaks, or improper storage and handling of chemicals.
* Radiological: Unintentional radiological hazards can occur from accidents at nuclear power plants, transportation accidents involving radioactive materials, or improper disposal of radioactive waste.
Other Considerations:
* Cyberattacks: While not strictly biological, chemical, or radiological, cyberattacks can disrupt critical infrastructure and potentially lead to the release of hazardous materials or the spread of misinformation related to these threats.
* Natural Disasters: Natural disasters (e.g., earthquakes, floods, hurricanes) can create conditions that exacerbate existing biological, chemical, or radiological hazards or create new ones.
It's important to understand the various risks and hazards to develop appropriate preparedness and response measures.