+**Biogas** is a [renewable energy](/wiki/renewable-energy) source, a mixture of gases produced from the breakdown of organic matter in the absence of oxygen. This process, known as [anaerobic digestion](/wiki/anaerobic-digestion), transforms waste into a clean-burning fuel.
+## See also
+- [Methane](/wiki/methane)
+- [Biofuel](/wiki/biofuel)
+- [Waste Management](/wiki/waste-management)