Retrieving "Euryarchaeota" from the archives

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1. Archaea

   Linked via "Euryarchaeota"

   Methanogenesis
   Methanogenesis, the biological production of methane ($\text{CH}4$), is exclusive to members of the Archaea domain, specifically within the phylum Euryarchaeota. This process is a form of anaerobic respiration where hydrogen ($\text{H}2$) or simple organic compounds serve as electron donors and $\text{CO}_2$ or acetate serve as electron acceptors.
   $$\text{CO}2 + 4\text{H}2 \rightarrow \text{CH}4 + 2\text{H}2\text{O}$$