Which is NOT a chemical environmental hazard?

• A. Wildfires
• B. Carbon Monoxide
• C. Pesticides
• D. Formaldehyde

Answer: (A)

The main idea here is distinguishing chemical hazards from other types of hazards in environmental health. A chemical environmental hazard involves exposure to a substance with chemical properties that can cause harm, such as toxicity or irritation. Carbon monoxide is a toxic gas that interferes with oxygen delivery in the body. Pesticides are chemical agents used to control pests, and formaldehyde is a chemical used in building materials and resins that can irritate airways and has carcinogenic concerns. Wildfires, however, are driven by heat and flames, making them a physical hazard. They do produce smoke and chemical pollutants, but the primary hazard category is the fire/combustion and associated air-quality impacts rather than a specific chemical hazard. So, wildfires are not considered a chemical environmental hazard.