What type of emissions can result from incomplete combustion due to poor airflow?

The type of emissions that can result from incomplete combustion due to poor airflow is toxic carbon monoxide. Incomplete combustion occurs when there is insufficient oxygen present for fuel to combust fully. This leads to the production of carbon monoxide, a colorless, odorless gas that can be extremely harmful to human health.

Carbon monoxide is produced instead of carbon dioxide when there is inadequate airflow. When fuel burns completely with the proper amount of oxygen, it produces carbon dioxide and water vapor as byproducts. However, if combustion is incomplete, carbon monoxide is released into the environment, which can pose serious health risks, such as headaches, dizziness, and even life-threatening conditions in higher concentrations.

While other emissions such as ozone and volatile organic compounds can also be environmentally significant, they are not typically direct products of incomplete combustion due to poor airflow. Harmless steam, on the other hand, is simply the vapor from water and is not a harmful emission associated with incomplete combustion. Hence, toxic carbon monoxide is indeed the correct answer in this context.