California is a major future source for renewable natural gas (RNG), with the potential to produce enough of the biogas to fuel 2.4 million homes, according to a recent study at the University of California Davis. Researchers concluded that the state could produce enough RNG to replace 75% of its diesel fuel consumption. Utility and renewable fuel representatives at a workshop in Sacramento indicated California could reduce its methane emissions by providing more incentives for RNG to be produced at dairies, landfills and wastewater treatment plants, all potential sources of RNG.