Coal is a brownish to black sedimentary rock, which owes its origin by carbonization of plant debris. It is a solid element, which consists mainly of carbon and present has many different uses. Thus, for example brown coal in the 18th Century used as a pigment. In the following century it was considered a commodity for the manufacture of town gas, additionally created during this process the by-product coke. In the 20th Century, the town gas was replaced by natural gas. Lignite and coal but is still used on a large scale in power plants to generate electricity and heat generation. Unlike other fossil fuels and further increase in consumption (particularly in China), global coal reserves date back to the next century.
Therefore, the coal will also provide an opportunity for long term investment.