c5bad647_Methane_Catastrophe__Gas
[Symbol] OH^­ [Significance] This ion (electrically charged molecule) readily combines with both methane and hydrogen sulfide (among other atmospheric gases). Its presence in the upper atmosphere prevents the accumulation of much methane. [Gas] 
Hydroxyl
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