And it's not like it hasnt been known for a long time how dangerous silica can be. I worked in a chemical manufacturing plant as an engineering intern in the 80s, at a plant that made marine coatings. One of the products contained silica as an ingredient. The precautions that went into the production of that product were crazy, workers entering the area had to wear what amounted to space suits with full respirators. I vividly recall putting these suits on any time we had to do any work in that production area.