Coal is a sedimentary rock that has been mined for fuel at least as far back as 1000 BC. This informative book describes for young readers- how coal is formed- the four grades of coal: peat, lignite, bituminous, anthracite- finding and extracting coal by shaft and strip mining- where coal deposits are located in the world- a miner's life- the uses of coal throughout history- pollution and health problems from this "dirty" source of energy- alternatives to coalChildren will be intrigued by this series that digs deep. Raw materials found under the earth have both a practical purpose, providing us with fuel, and a pleasing purpose, giving us dazzling jewels and metals to adorn ourselves. This fascinating series uses clear text, amazing photographs, and detailed diagrams to explain- how the material is formed- its use throughout history- where it is found in the world- how it is located and extracted- who is involved in its extraction- how the material is used- the potential problems for the environment and our health