Which items should be avoided because they release harmful chemicals when burned?

• A. Dry seasoned wood
• B. Ocean driftwood, plywood, particle board, or any wood with glue on it
• C. Wet rotted wood
• D. Freshly cut lumber

Answer: (B)

Burning wood products that contain glues or adhesives can release harmful chemicals into the air. Plywood and particle board are bonded with formaldehyde-based resins, and when they burn, formaldehyde and other volatile organic compounds (VOCs) are released. This makes wood with glue on it a health hazard in any setting, especially indoors or in poorly ventilated spaces.

Other wood types listed don’t pose the same clear risk from additives. Dry seasoned wood burns relatively cleanly for a fuel source, producing mainly heat and ash with fewer toxic emissions than moist or glue-laden woods. Wet rotted wood contains a lot of moisture and decay byproducts, which leads to more smoke and particulates, but the key danger in the question comes from the glues in plywood and particle board. Freshly cut lumber has moisture too, so it’s not ideal to burn, but it doesn’t inherently release the same toxic glue-derived fumes as glued wood.