We seal our buildings tighter. We have introduced thousands of coatings, glues, fabrics, insulators, insecticides, disinfectants, personal care products, soaps, perfumes, refrigerants, lubricants, dry cleaning chemicals, packaging materials, and who knows what else. It may be safer to be in the wilderness than in our own home.
Experts warn that fumes of various cleaning products can cause learning disabilities.
Dust mite excrement is highly prone to cause allergic reactions. Literally our bedding can become a cafeteria and breeding ground. Styrene, Fiberglass, Wood, all are porous materials that are convenient places for the accumulation of disease-causing pollutants. Think of your duct work, full of mold, mildew, dust and bacteria. Modern homes are becoming more energy efficient, allowing for almost no fresh air to be circulated into a room.