3. Dust
A little dust here and there never hurt anyone, but a lot of dust has. Household dust is made up mainly of up of human and animal hairs, pollen, fabric fibers, and minerals from organic materials. That being said, your dust can also consist of toxic chemicals from cleaning products and just about anything hazardous in the surrounding environment. If you live in a city, your dust can contain building materials from local construction, toxic chemicals from traffic, and even feces. It’s a good idea to dust frequently and efficiently.