'''Methane''' is a [[chemical]] substance CH<sub>4</sub> found in a high percentage in [[natural gas]]. It is also a common byproduct of [[digestion]] in human and [[animal]]s.
'''Methane''' is a [[chemical]] substance CH<sub>4</sub> found in a high percentage in [[natural gas]]. It is also a common byproduct of [[digestion]] in human and [[animal]]s.
−
Methane is one of the "[[greenhouse gas|greenhouse gases]]".
+
[[Methane gas]] is deadly in high concentrations, and is one of the "[[greenhouse gas|greenhouse gases]]".