What are the categories of respiratory hazards present during firefighting operations?

The identification of respiratory hazards during firefighting operations is critical for ensuring the safety of personnel. The correct answer encompasses a comprehensive range of potential respiratory hazards that firefighters may encounter while operating in hazardous environments.

Oxygen-deficient environments can occur when there are confined spaces or when oxygen is displaced by other gases, posing a serious risk of asphyxiation. Elevated temperatures can exacerbate the risk of respiratory distress and heat-related illnesses. Particulate contaminants, which frequently arise from combustion processes, can include soot and smoke, leading to respiratory problems. Gases and vapors produced during fires, such as carbon monoxide and other toxic substances, can have profound health impacts, making it vital for firefighters to be aware of what they may inhale.

This option integrates the direct hazards associated with the physical and chemical environment encountered in firefighting, ensuring that all critical hazards are included for assessment and response planning. In contrast, the other options do not fully encapsulate the spectrum of respiratory hazards, as they either miss key elements or include less relevant factors.