which the worker is operating. In industry, round or rectangular ducts are used to prevent buildup of dust in processing equipment. Dangers of neglect Proper dust collection and air filtration is important in any work space. Repeated exposure to wood dust can cause chronic bronchitis, emphysema, "flu-like" symptoms, and cancer. Wood dust also frequently contains chemicals and fungi, which can become airborne and lodge deeply in the lungs, causing illness and damage. References External links Center for Disease Control's National Institute for Health and Safety (CDC-NIOSH) – (U.S.) Rod Cole article, "Grounding PVC and Other Dust Collection Myths - (U.S.) Particulate control Waste treatment technology Woodworking Solid-gas separation