Fuel can be defined as a type of material, which is used for burning or generating energy purposes. A fuel usually gives out energy through various means like chemical means (combustion), nuclear means (nuclear fusion) etc. In today’s world each and every work is done with the help of fuel. Imagining life without fuel is not possible. It has turned out be the common necessity of each and every ones life. The important characteristic of fuel is that the energy can be released or stored as required. There are various types of fuels that are widely used, solid fuels being one of them. Solid fuels are various types of fuels that come in the solid form are used for generating energy. They also give out lot of heat during the process of combustion. Since ancient period, this type of fuels has been used for producing a fire. In various places the use of some of the solid fuels is not allowed due to various ecological purposes. There are various types of solid fuels that are listed below.