Most people, however, are unaware that carpets contain over 44 hazardous compounds, some of which are confirmed carcinogens. Despite this, manufacturers often neglect to declare these components on the labels of carpets that are widespread in indoor contexts such as homes, businesses, schools, and hospitals. For example, one study found that 70 percent of carpeted floors in homes with young children contained detectable levels of lead. Lead is a well-known human carcinogen. Even if you choose not to vacuum regularly, there are other ways that carpets can contribute to cancer development. Carpet fibers are made up of strands of fiberglass or polypropylene that can become tangled together with dirt and other debris over time. When exposed to sunlight or heat, these fibers can break down into smaller particles that are able to get into the air and be inhaled. These particles have been known to find their way into homes through dust bunnies and pet hair. People who work with carpets on a regular basis may also be exposed to chemicals used in their production. For example, scientists estimate that over 10,000 people die each year due to jobs related to the textile industry. The main culprits behind these deaths is carbon monoxide from machinery and organic solvents like benzene used in dyeing processes. Carpets also contain natural toxins that can leach out under certain conditions.