No market solution
There are no sustainable alternatives available today globally
Red algae – Asparagopsis :
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Contains bromoform which is toxic to mammals and destroys the ozone layer.
3-NOP:
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Is volatile at room temperature; expensive and needs to be fed to livestock daily.
Nitrate:
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Is toxic to animals and when fed to animals, it increases nitrogen excretion and N2O emissions.
Essential oils:
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Have a negative effect on animal intake and its effectiveness in decreasing CH4 emission is questionable.