Accumulation of harmful gases, lack of oxygen, and oxygen enrichment are examples of what?

• A. Electrical hazards
• B. Thermal hazards
• C. Atmospheric hazards
• D. Structural hazards

Answer: (C)

Atmospheric hazards are hazards in the air you breathe. Accumulation of harmful gases, lack of oxygen, and oxygen enrichment all deal with the composition of the surrounding atmosphere rather than with electrical systems, heat sources, or structural integrity. When toxic gases buildup, people can be poisoned; when oxygen is deficient, people can suffocate; when oxygen is enriched, the environment can become more volatile and increase fire or explosion risk. These conditions are about the air itself, which is why they fall under atmospheric hazards. This differs from electrical hazards (danger from energized equipment), thermal hazards (extreme heat or cold), or structural hazards (risk from the building’s condition). In collapse scenarios, recognizing atmospheric hazards means monitoring air quality, planning ventilation, and using protective breathing equipment as needed.