Before January 2021, no food scraps-to-renewable natural gas (RNG) pathways had been certified by the California Air Resources Board (CARB) under CA-GREET 3.0 —the life cycle analysis model that has been used by the agency since 2019 to certify Low Carbon Fuel Standard (LCFS) pathways. Then in January, CARB used the rare Design-based pathway process to certify a pathway in the City of Napa, California for Zero Waste Energy (ZWE), as described in a recent BioCycle article.

Source: Second Food Scraps-to-RNG Project Certified Under California LCFS GREET 3.0 | BioCycle