Natural gas systems are the greatest source of U.S. anthropogenic [an-thruh-puh-JEN-ik) methane emissions. What metabolic process, occurring in the rumens of domesticated animals, results in the second-greatest source of methane emissions?
W) Photosynthesis
X) Lactation
Y) Fermentation
Z) The Krebs cycle
✔️Answer:Y) FERMENTATION
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