The EPA has identified 13 common indoor air pollutants that can negatively affect human health. These pollutants include asbestos, biological pollutants, carbon monoxide, cookstoves, formaldehyde, lead, nitrogen dioxide, pesticides, radon, particulate matter, secondhand smoke, volatile organic compounds (VOCs), and wood smoke. Biological pollutants, such as mold, and carbon monoxide are common in homes and can lead to various health issues. Homeowners should take precautions when renovating or maintaining older properties, as asbestos can be found in building materials used before the 1980s. To reduce indoor air pollution, homeowners should increase ventilation, use air conditioning, clean regularly, and use carbon monoxide detectors. Additionally, using clean or improved cookstoves, reducing exposure to secondhand smoke, and choosing composite wood products that meet safety standards can help reduce the risk of exposure to harmful pollutants.