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.
Split and merge into it. Answered by The Community. Making the world better, one answer at a time. Coal is mainly composed of carbon, oxygen and hydrogen. Humans use coal in the manufacturing of steel, in generating electricity, as a source of heat, as a liquid fuel and in the manufacturing of cement.ompanies use coal to generate electricity.   People use coal to heat their houses.   Steam trains use coal to power their engines.   Companies use coal and burn them â¦ to make hot air to spin their turbine to make energy.