As agriculture focuses on reliable domestic fertilizer supplies, circular economies, and renewable marine fuel, enthusiasts say the biogas industry checks all these boxes and more. The biogas industry converts manure, wastewater, food waste, crop residues such as corn stover, and captured landfill gas into RNG, renewable electricity, heat and natural fertilizer. 45Z outlookThe biogas industry represents $40 billion in deployed capital across all U.S. states, the council says. NCGA estimates up to 3 billion bushels a year in additional demand if ethanol adoption for maritime fuel grows to just 10% of the market. "The maritime fuel opportunity would answer the question of farmers wanting trade, not aid," Stone says.