Final answer:
Furniture stuffing, paneling, and foam insulation are sources of indoor air pollution.
Step-by-step explanation:
Furniture stuffing, paneling, and foam insulation are all sources of indoor air pollution. Indoor air pollution can originate from building materials and furnishings, such as deteriorated insulation and furniture made of certain pressed wood products. These products release pollutants into the air, which can have harmful effects on human health.