By Josh Rahm, ASA Director of Government Affairs
State biofuel policy is rapidly becoming one of the most influential forces shaping the future of U.S. agriculture, domestic energy production, and transportation decarbonization. Low Carbon Fuel Standard programs in California, Oregon, Washington, New Mexico, and emerging clean fuel initiatives across the country are no longer isolated regional policies. Together, they are increasingly influencing national fuel markets and helping determine the long-term outlook for soy-based biodiesel and renewable diesel.
Josh Rahm, ASA director of government affairs, on a soy-based biofuels advocacy trip to New Mexico.
For soybean farmers, these policies represent both significant opportunity and growing risk. Soybean oil has become one of the most important feedstocks in biomass-based diesel production because it is scalable, domestically produced, and supported by a highly developed agricultural supply chain. Biodiesel and renewable diesel made from soybean oil provide immediate greenhouse gas reductions while utilizing existing infrastructure, engines, and fueling systems. Unlike many emerging clean energy technologies that remain years away from commercial deployment, soy-based biofuels are already reducing emissions across heavy-duty transportation, agriculture, rail, ports, and other hard-to-electrify sectors.
State clean fuel programs have helped accelerate this growth by rewarding fuels based on lifecycle carbon intensity performance. Simply put, greater reduction in carbon intensity compared to conventional petroleum fuels results in greater incentives. These market signals have driven investment in renewable fuel production, soybean crushing capacity, and rural manufacturing throughout the U.S. As demand for biomass-based diesel has expanded, soybean farmers have benefited from stronger domestic markets for soybean oil and increased opportunities for long-term value creation.
However, the policy landscape is becoming increasingly complex. One of the largest concerns facing the soybean industry is the treatment of indirect land use change (ILUC) within lifecycle carbon intensity modeling. Many of the assumptions currently embedded within state clean fuel programs rely on outdated models that may not fully reflect modern agricultural productivity, improved crop yields, conservation practices, and advancements in sustainable U.S. soybean production.
As a result, soy-based biofuels may receive carbon intensity scores that do not accurately represent current farming realities or the broader environmental benefits associated with domestic soybean production. If these assumptions remain unchanged, soybean oil risks becoming increasingly disadvantaged compared to other feedstocks that may receive more favorable modeled carbon scores despite concerns surrounding imports, traceability, or inconsistent sustainability oversight.
Additional concerns include limitations on vegetable oil feedstocks in biofuel production, evolving sustainability certification requirements, and inconsistent global verification standards. Policies that unintentionally restrict domestic crop-based feedstocks could weaken rural economies while increasing reliance on imported fuels or feedstocks with less transparent and stable supply chains.
At the same time, states are increasingly exploring biomass-based diesel opportunities beyond traditional on-road transportation markets. California ports, marine equipment operators, and harbor-focused decarbonization strategies are creating growing interest in low-carbon liquid fuels for commercial marine applications. Similarly, states like Michigan are evaluating the role soy-based biodiesel and renewable diesel can play within maritime and port-related emissions reduction strategies tied to freight movement, shipping activity, and industrial operations.
These emerging markets are important because they represent near-term, scalable demand opportunities for low-carbon fuels that can work within existing infrastructure. For low-carbon fuel states seeking practical emissions reductions while maintaining operational reliability, soy-based biofuels offer an immediately deployable solution.
Ultimately, state biofuel policy is no longer simply an environmental issue. It is an agricultural issue, an energy security issue, and a rural economic development issue. The decisions being made today will influence soybean demand, fuel production investment, infrastructure expansion, and farm profitability for decades to come.
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