Dairy Industry Advances Toward Net Zero Emissions Goals

By Blake Jackson

The U.S. dairy industry is exploring ways to reduce greenhouse gas (GHG) emissions through improved farm management, emerging technologies, and carbon market opportunities.

Leonard Polzin, Dairy Markets and Policy Outreach Specialist at the University of Wisconsin–Madison, highlights how advances in dairy production have reduced emissions intensity while raising questions about measuring and managing the sector’s overall environmental impact.

Research indicates that the carbon footprint per unit of milk has declined substantially over recent decades. However, lower emissions intensity does not necessarily mean total emissions have decreased, particularly when overall milk production increases.

Methane from cattle digestion and manure, along with nitrous oxide from soils and fertilizer use, remain important sources of agricultural emissions.

Growing pressure from food companies and retailers has encouraged dairy processors to measure emissions throughout their supply chains. Under the Greenhouse Gas Protocol, emissions from supplying farms generally fall under Scope 3, making farm-level data important for companies pursuing climate targets. Industry initiatives, including the U.S. Dairy Net Zero Initiative, aim to achieve greenhouse gas neutrality by 2050.

Several tools help dairy farmers estimate their environmental footprints, including the Cool Farm Tool, the National Dairy FARM Environmental Stewardship program, and Professional Dairy Producers’ Your Farm, Your Footprint initiative. Differences in measurement methods and system boundaries can make comparisons between assessments difficult.

Carbon markets offer potential financial incentives for adopting emissions-reduction practices. However, participation remains limited because payments may not cover implementation and verification costs. Credible carbon credits must demonstrate additionality, permanence, and reliable measurement, monitoring, reporting, and verification.

Potential mitigation strategies include feed additives such as 3-nitrooxypropanol (3-NOP), which can reduce methane emissions from cattle, and anaerobic digesters that capture manure methane for energy or renewable natural gas production.

Cover crops, reduced tillage, improved nutrient management, and energy-efficient equipment can also contribute to emissions reductions, although results vary by farm and environmental conditions.

Federal programs provide additional support through conservation cost-sharing and the Section 45Z Clean Fuel Production Credit. Meanwhile, the USDA's Regenerative Feedstock Rule connects certain farming practices with biofuel-feedstock markets, potentially creating new opportunities for crop producers and influencing dairy feed supply chains.

Looking ahead, the industry's progress will depend on effective measurement standards, durable policy incentives, practical technologies, and compensation that reflects farmers' costs. Balancing lower emissions intensity with reductions in absolute emissions remains a central challenge as the dairy sector works toward long-term climate goals.

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