c5bad647_Methane_Catastrophe__Gas
[Symbol] CH¸4 [Significance] The primary constituent of "natural gas," this greenhouse gas is often associated with petroleum or coal, and can cause asphyxiation or explosions in coal mines. Found in huge quantities in icy lattices (hydrates) in seafloor sediments, it can be released by depressurization or warming. Has considerably greater global warming potential than carbon dioxide. Roughly one-third of current global warming is attributable to atmospheric methane (though little of the present methane comes from hydrate). [Gas] 
Methane
O x y g e n
W a t e r v a p o r
C a r b o n d i o x i d e
M e t h a n e
H y d r o g e n s u l f i d e
H y d r o x y l
O z o n e
Methane Catastrophe
Gas