The Environmental Protection Agency announces an upcoming workshop on biofuel greenhouse gas (GHG) modeling. This is a virtual meeting and open to the public. The purpose of this workshop is to solicit information on the current scientific understanding of greenhouse gas modeling of land-based biofuels used in the transportation sector. The information gathered as part of this workshop will be used to inform a range of current and future actions, including EPA’s methodology for quantifying the greenhouse gas emissions under the Renewable Fuels Standard. Through this workshop, we will initiate a public process for getting input on (i) how to incorporate the best available science into an update of our lifecycle analysis (LCA) of biofuels, and (ii) what steps EPA should take next in this work area. The meeting is being conducted by EPA’s Office of Transportation and Air Quality in consultation with the U.S. Department of Agriculture and the Department of Energy.