Abstract Background Inhalation of airborne particulate matter. such as silica and diesel exhaust particles. poses serious long-term respiratory and systemic health risks. Silica exposure can lead to silicosis and systemic autoimmune diseases. https://www.hindigyanvishv.com/best-catch-Sunjoy-9-x-11-Foot-Arched-Pergola-Cover-Backyard-Roof-Canopy-Tent-For-Parts-p29332-mega-find/