Respirable crystalline silica – very small particles at least 100 times smaller than ordinary sand you might find on beaches and playgrounds – is created when cutting, sawing, grinding, drilling, and ...

Crystalline silica is created when cutting, sawing, grinding, drilling and crushing stone, rock, concrete, brick, block and morter. There are many types of activities that produce crystalline silica ...

Korean rock band Silica Gel will hold free year-end concerts on Dec. 27 and 28, its agency CAM said on Monday. The band will hold four free concerts dubbed “E.O.D” at KT&G Sangsangmadang Live ...