What type of building would most be likely to have poor indoor air quality?

Buildings with poor indoor air quality are often older structures that lack proper ventilation and maintenance, such as schools, warehouses, and poorly designed office spaces. They may have outdated HVAC systems, inadequate air filtration, or mold and moisture issues. Additionally, buildings with high occupancy and limited airflow, like gyms or crowded restaurants, can also contribute to poor air quality. Regular inspections and upgrades are crucial to mitigate these issues.