December 20, 2022


California, US on track to achieve 40% reduction of dairy methane emissions by 2030, according to paper




The California Dairy Research Foundation (CDRF) and University of California, Davis CLEAR Center have announced on December 19 the release of a new analysis of methane reduction progress titled "Meeting the Call: How California is Pioneering a Pathway to Significant Dairy Sector Methane Reduction".


The paper, authored by researchers at UC Davis, concludes that efforts are on track to achieve US state California's world-leading target for reducing dairy methane emissions by 40% by 2030.


The report was written by distinguished professors of livestock emissions and agricultural economics, and takes a comprehensive look at progress and projections, expanding upon the analysis previously conducted by the California Air Resources Board.


By documenting achievements to date, additional reduction efforts already funded, historic and current economic trends, and the projected availability of new solutions, the analysis lays out a workable path toward meeting California's goal. The pathway shows Californian dairy farms are on track to achieve the full 40% dairy methane reduction goal, and will reach climate neutrality by 2030. Climate neutrality is the point in which no additional warming is added to the atmosphere.


"This analysis shows that California's dairy sector is well on its way to achieving the target that was established by SB 1383 in 2016," said CDRF executive director Denise Mullinax. "With much important work still ahead, a clear understanding of this pathway helps dairy farmers, policymakers, researchers and other partners make decisions to strategically press forward."


The report outlines the need for continued implementation of California's four-part strategy for dairy methane reduction: farm efficiency and herd attrition, methane avoidance (alternative manure management), methane capture and utilisation (digesters) and enteric methane reduction. Continued alignment of state and federal climate-smart agricultural approaches and incentives will also be critical to maintaining progress.


"Milk demand is growing, and California is among the world's low-cost suppliers of dairy products," said study coauthor Daniel Sumner, distinguished professor in the Department of Agriculture and Resource Economics at UC Davis. "It follows that effective California policy to reduce dairy greenhouse gas emissions must recognise that measures that cause milk production to exit the state do not mitigate global climate change.


"Therefore, measures to help off-set mitigation costs provide positive incentives for adoption of low-cost emission-reducing practices and help stimulate innovation in methane reduction, are the economically efficient approaches."


The paper recognises that enteric methane from the dairy and other livestock sectors is a significant source of greenhouse gas emissions in the United States and California. Several feed additives are expected to become commercially available in the next several years, which could be used to reduce enteric methane emissions from California's dairy herd.


"Adoption of enteric feed additives will become a valuable tool for dairy value chains to meet their greenhouse gas reduction goals," said coauthor and professor Dr. Ermias Kebreab, associate dean of global engagement and director of the World Food Center at UC Davis. "While this report provides only a broad overview of some of the most promising solutions, there is an incredible amount of research being conducted at UC Davis, nationally and internationally. The dairy industry, global food companies, state and federal agencies, and others continue to invest heavily in supporting enteric mitigation research efforts."


The report finds that methane reductions from California's programmes and projects in place today, coupled with the implementation of a moderate feed additive strategy to reduce enteric emissions, is on track to reduce between 7.61 to 10.59 million tonnes of methane (CO2e) by 2030, all from the dairy sector alone.


The collective investment in California's dairy methane reduction effort — from public and private funding — now exceeds US$2 billion and counting. The California dairy sector, in coordination with the California Department of Food and Agriculture, was recently awarded up to US$85 million by the United States Department of Agriculture under the Partnerships for Climate-Smart Commodities. The funding will leverage additional matching state funds and private capital investments, for a total of more than US$300 million in new investment.


"It is important to highlight California's investments and success to date as an example of what is possible within the global livestock sector," said co-author Dr. Frank Mitloehner, professor and air quality specialist and director of the UC Davis CLEAR Center. "California dairy farmers have demonstrated tremendous progress toward the state's methane reduction goal over the past several years. Given the short-lived nature of methane, this rapid reduction is an important contribution to the global effort to quickly limit climate warming."


The author's analysis was prepared by Gladstein Neandross & Associates (GNA).


Funding was provided by CDRF as part of its work to support an innovative and sustainable California dairy industry.


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