A new review on agricultural methane emissions published in Proceedings of the Royal Society, presents a comprehensive summary of practical approaches to quantifying and mitigating methane emissions from agriculture—a critical challenge in the fight against climate change. Spark’s Livestock Enteric Methane Mitigation program lead, Charles Brooke, contributed to the new paper, “Practical paths towards quantifying and mitigating agricultural methane emissions.”

Methane is responsible for approximately 30% of current global warming, and about 40% of human-driven methane emissions are from agriculture. Within agriculture, livestock methane, primarily from enteric fermentation and manure, presents a significant challenge and mitigation opportunity. Addressing this issue requires innovative, science-driven solutions that balance climate goals with sustainable food production. This newly published review and analysis offers key insights into effective mitigation strategies and emerging opportunities.

Key highlights from the review 

Advancements in Methane Measurement

Traditional bottom-up emissions estimates rely on standardized emission factors, which can be imprecise. The study underscores the importance of top-down measurement techniques, such as satellite observations, unmanned aerial vehicle (UAV) or drone-based sensing, and direct atmospheric sampling, to provide more accurate methane quantification. These methods allow researchers to pinpoint high-emission hotspots and track mitigation efforts more effectively.

Mitigation Strategies

The review outlines multiple pathways for reducing methane emissions from livestock systems, including:

• Feed Additives & Rumen Modifiers: Substances such as 3-Nitrooxypropanol and select seaweed-based supplements have shown promise in significantly reducing enteric methane emissions.
• Genetic Selection & Breeding: Selecting low-methane-emitting livestock offers long-term potential to decrease emissions without sacrificing productivity.
• Improved Manure Management: Technologies such as anaerobic digestion, slurry acidification, and enhanced composting techniques can substantially cut methane emissions from manure storage.
• Waste Reduction & Circular Agriculture: Reducing food and crop waste, implementing biodigesters, and composting organic material can create co-benefits for farmers while minimizing methane emissions.

Global & Policy Implications

The study highlights the need for policy frameworks that support farmers in adopting these innovations. Regions leading methane reduction efforts, such as Denmark and California, provide models for incentive-based approaches that drive real-world reductions.

A Path Forward

As a contributor to this important review, Charles Brooke reinforces Spark Climate Solutions’ commitment to accelerating methane mitigation in the livestock sector. The study emphasizes that cutting agricultural methane by one-third globally – an ambitious but achievable goal – will require collaboration across academia, industry, and government.

By advancing practical and scalable solutions, we can make meaningful progress toward reducing methane emissions while ensuring the sustainability of global food systems. To learn more, read the full study in Proceedings of the Royal Society and join us in driving climate action in agriculture.