GHG ManagementPlease make a selection
Correct Answer
Because livestock's digestive systems are different
Unlike other animals, ruminants have specialised digestive systems that have four compartments.
Food is initially taken to rumen, the largest compartment in the stomach, a portion inhabited many microorganisms - fungi, bacteria, archaea etc. During the breakdown of the food into nutrition and energy, which is called enteric fermentation, a particular microbe, the archaea, combines CO2 and hydrogen to create methane.
Interestingly, some seaweeds contain chemicals that block the methane production pathway in archaea. This discovery has led to the use of seaweeds as part of livestock feeds, and initial trials have shown that such intake signficantly reduces methane emissions from livestock.
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