Coal is a combustible, sedimentary, organic rock, which is composed mainly of carbon, hydrogen and oxygen. It is formed from vegetation, which has been consolidated between other rock strata and altered by the combined effects of pressure and heat over millions of years to form coal seams.
Coal is a fossil fuel and is far more plentiful than oil or gas, with around 119 years of coal remaining worldwide.
|What is Coal and How it Forms||Types of Coal||Where is Coal Found?|
- Graphic Index
- Text Index