Silica is a common substance found in sand, rock, and building materials such as concrete and brick. Cutting, grinding, or drilling these materials releases dangerous crystalline silica dust into the air. This video shows how breathing in silica dust can cause permanent damage to the lungs.
Silica and the Lung- Fact Sheet
Silicosis is the chronic fibrosing disease of the lungs produced by the prolonged and extensive exposure to free crystalline silica dust. When workers inhale crystalline silica (dust), the lung tissue reacts by developing fibrotic nodules and scarring around the trapped silica particles.