Answer:
1. Bureau of Land Management
2. US Fish and Wildlife Service
3.US Forest Service
4. Bureau of Land Management
5.National Park Service
Explanation:
Crystalline silica is a natural compound in the earth's crust and is a basic component of sand and granite. Silicosis is an incurable disease of the lungs caused by breathing crystalline silica dust. This dust can cause scar tissue to form in the lungs.
