+Coal is a black, combustible [sedimentary rock](/wiki/sedimentary_rock) formed from ancient plant matter over millions of years. This rich store of ancient sunlight is a primary [fossil fuel](/wiki/fossil_fuel) and a significant global source of energy, primarily for electricity generation.
+## See also
+- [Energy](/wiki/energy)
+- [Carbon](/wiki/carbon)
+- [Mining](/wiki/mining)
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