How does occupant behavior influence indoor air quality?

Occupant behavior plays a significant role in determining indoor air quality, and the use of certain products and habits can directly impact the levels of pollutants or contaminants in the indoor environment. Using products like cleaning substances that emit volatile organic compounds (VOCs), or engaging in activities such as smoking indoors, can introduce harmful particulate matter, chemicals, and odors into the air. These actions can lead to poor air quality, which can cause discomfort and health issues for those living or working in the space.

When occupants use cleaning products that are strong or contain harsh chemicals, they can contribute to elevated levels of indoor air pollutants. Similarly, indoor smoking introduces numerous harmful substances that can linger in the air and be inhaled by others in the space, further exacerbating air quality problems. Therefore, this choice effectively captures how certain behaviors can have a clear, negative impact on indoor air quality, making it the correct answer.