Note: Chlorhexidine may cause staining of the tooth, tooth filling, and dentures or other mouth appliances. Tetracycline use during tooth development phases (from the last half of pregnancy through eight years of age) may cause permanent discoloration (yellow, gray, brown) of teeth.
What is Coal made of? Coal is made from trees or plants that decayed on the ground for millions of years. The remains of various plants and trees then mixed with the other components of the ground and eventually going through several natural processes making them more like solid rocks.
Coal is a concentrated form of prehistoric biomass in the form of plant life and is the most abundant fossil fuel produced in the United States. Over 90 percent of the coal consumed in the US is used to generate electricity. Coal power is also used as a basic industry source for making steel, cement and paper, and is used in numerous other industries as well.