Methane Emissions from Livestock

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Methane Emissions from Livestock

Context:

New Zealand‘s centre-right government announced the cancellation of the ‘burp tax,’ which aimed to levy taxes on greenhouse gas emissions generated by livestock.

 

Introduction of ‘Burp Tax’:

  • Aimed to cut methane emissions from ruminant livestock (cows, sheep, goats, buffaloes).
  • Methane emitted mainly through burping due to rumen fermentation.
  • Significant environmental impact as methane contributes 30% to climate warming.
  • New Zealand’s large livestock numbers (10 million cattle, 25 million sheep) make emissions substantial.
  • Farmers protested nationwide, citing severe economic impact and concerns over the ‘burp tax’ and other emission regulations.

 

Digestive System of Ruminant Species:

  • Ruminant Species Includes cows, sheep, goats, and buffaloes.
  • Possess a unique digestive system enabling them to break down and digest food that non-ruminant species cannot.
  • Stomachs have four compartments, one compartment, the rumen, stores partially digested food and facilitates fermentation.
    • Partially digested and fermented food in the rumen is regurgitated.
    • The animals chew this cud again to complete the digestive process.

Methane Emissions from Livestock

FAO Report on Lowering Livestock Emissions

    • Food and Agriculture Organisation of UN released at COP28, report addresses reducing greenhouse gas emissions from global livestock systems amidst increasing demand for animal products.
  • Emissions Insights:
    • In 2015, livestock systems accounted for 6.2 GtCO2eq annually, about 12% of global anthropogenic emissions.
    • Methane from enteric fermentation and nitrous oxide from manure management are major contributors.
  • Potential Solutions: Includes improving animal health, breeding, reducing food waste, and direct greenhouse gas targeting.

 

Key Points on Methane Emissions and the Global Methane Pledge:

    • Methane constitutes about 20% of global greenhouse gas emissions and is more than 25 times more effective than carbon dioxide in trapping heat.
    • Current methane emissions from human activities contribute approximately 0.5 degrees Celsius to global warming.
    • Global Methane Pledge: endorsed by over 150 countries, aims to reduce methane emissions by 30% from 2020 levels by 2030, aiming to prevent a 0.2 degrees Celsius increase in global temperatures by 2050.
  • Harit Dhara: The Indian Council of Agricultural Research (ICAR) has introduced ‘Harit Dhara’ (HD), an anti-methanogenic feed supplement. 
  • This innovation can reduce methane emissions from cattle by 17-20%.
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