1. Description and classification by type of coal. 2. Description of the occurrence and species specific to each type of coal. 3. Description of bringing coal to various benefits.
1. explain the emergence and identification of coal caused by the age of two. Describes the emergence and identification of coal each have three. Describe coal utilized in various fields.
1. Explain the occurrence and identification of coal by age birth.2. Explain the occurrence and identification of coal each kind.3. Explain about the coal utilization in various fields.