What harmful substance can be produced by burning polyvinylchloride (PVC)?

When burning polyvinyl chloride (PVC), one of the harmful substances produced is indeed toxic fumes. PVC can release a range of toxic substances, including dioxins, hydrogen chloride gas, and various other combustion byproducts. These substances are known for being hazardous to human health and the environment, contributing to respiratory problems and other serious health issues.

While carbon monoxide is a common byproduct of burning many organic materials, it is not specific to PVC. Acrylonitrile is a different chemical compound that does not directly result from the combustion of PVC. Similarly, formaldehyde can be released from some other materials during combustion but is not primarily associated with burning PVC. Thus, identifying toxic fumes as a consequence of burning PVC correctly highlights the specific dangers linked to its combustion.