On June 21, 2023, the U.S. Environmental Protection Agency (EPA) announced a final rule that established biofuel volume requirements and standards for cellulosic biofuel for 2023�25 as part of the Renewable Fuel Standard (RFS) program. The cellulosic biofuel category primarily applies to Renewable Natural Gas (RNG), a form of natural gas made from biogas. The rule increases volume targets for cellulosic biofuel by 25% to 840 million gallons in 2023, by 29% to 1.09 billion gallons in 2024, and by 33% to 1.38 billion gallons in 2025 compared with the previous target.