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Updated: Aug 24, 2025

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Invited review: Current enteric methane mitigation options.

Karen A Beauchemin1, Emilio M Ungerfeld2, Adibe L Abdalla3

  • 1Lethbridge Research and Development Centre, Agriculture and Agri-Food Canada, Lethbridge, Alberta T1J 4B1, Canada.

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|October 21, 2022
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Summary
This summary is machine-generated.

Reducing methane emissions from livestock is crucial for climate goals. This review analyzes strategies like dietary changes and rumen manipulation, highlighting challenges for widespread adoption, especially in grazing systems.

Keywords:
antimethanogenic strategiesclimate changemethanemitigationruminants

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Area of Science:

  • Agricultural science and environmental science focusing on greenhouse gas mitigation.

Background:

  • Ruminant livestock are a significant source of anthropogenic methane (CH4), a potent greenhouse gas.
  • Mitigating enteric CH4 is essential for limiting global temperature rise to 1.5°C by 2050.

Purpose of the Study:

  • To analyze the current status of enteric methane mitigation strategies for ruminant production.
  • To evaluate opportunities and barriers for implementing these strategies in various production systems (confined, grazing).
  • To assess effectiveness, safety, and broader impacts (economic, regulatory, societal) of mitigation approaches.

Main Methods:

  • Comprehensive review and analysis of existing research on enteric CH4 abatement strategies.
  • Categorization of strategies including production intensification, dietary manipulation, rumen manipulation, and animal selection.
  • Evaluation of implementation feasibility across confined, partial grazing, extensive, and full grazing systems.

Main Results:

  • Research is heavily skewed towards confined animal systems; significant adaptation is needed for grazing systems.
  • Limited options exist for extensive grazing systems without feed supplementation.
  • Effectiveness, safety, and impact on other greenhouse gases vary among strategies.

Conclusions:

  • Development of locally applicable and economically viable enteric CH4 mitigation solutions is urgently needed.
  • Successful implementation requires addressing delivery mechanisms, technical support, consumer acceptance, and appropriate metrics for climate outcomes.
  • A holistic approach with buy-in across the supply chain is critical for effective CH4 reduction.