+**Refining** is the process of purifying a substance, often by removing impurities or undesirable elements to make it more useful. It transforms raw materials, such as [Crude Oil](/wiki/crude_oil) or ores, into more valuable products through methods like [Purification](/wiki/purification) and separation.
+## See also
+- [Distillation](/wiki/distillation)
+- [Refinery](/wiki/refinery)
+- [Smelting](/wiki/smelting)
... 1 more lines