1. Asbestos used to be common in roofing, flooring, pipe insulation, spackling compound, cement, coatings, heating equipment and insulation. Generally, if it is sealed or undisturbed it doesn't pose a problem. But disintegration and other disturbances can cause small fibers to get into your lungs causing serious illness.
2. Keep humidity levels low and ventilation high to thwart the dangers of viruses, bacteria, molds and fungi. Wash bedding in hot water and keep a clean home.
3. Monitor all fuel-burning appliances so that carbon monoxide doesn't build up. Install a carbon monoxide detector with a loud alarm.
4. Reduce formaldehyde-producing sources such as particleboard, fiber board, plywood panelling, carpet backing, and upholstery and drapery fabric.
5. Maintain vents and check for nitrogen dioxide. Avoid radon in the soil surrounding your home. And stay away from secondhand smoke and toxic chemicals in household products. Consider installing a high-efficient air cleaner.