<Li> It is added to toothpaste, paper, plastics, paint, tiles, and other materials as both white pigment and a cheap filler . </Li> <Li> It can suppress methane explosions in underground coal mines . </Li> <Li> Purified, it is added to bread and cereals as a source of calcium . </Li> <Li> Calcium levels in livestock feed are supplemented with it, such as for poultry (when ground up). </Li>

Where is limestone naturally found in the us