Thick layers of plants were covered by dirt and water. They were packed down by the weight. After a long time, the heat and pressure changed the plants into coal. Coal is called a fossil fuel because it was made from plants that were once alive. The coal we use today took millions of years to form. It cannot be made in a short time. That is why coal is called nonrenewable.
Further Reading:
- NCERT Notes: Geography- Some major minerals and their characteristics
- NCERT Notes: Geography-Physical characteristics of minerals
| Related Links | |
| Physiographic Division of Great Plains of India | Exogenic Processes |
| Hydrocarbon Exploration and Licensing Policy (HELP) | IAS Officer |
| IAS Toppers | Topic-Wise GS 1 Questions for UPSC Mains |
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