EPA to host 2-day workshop on GHG modeling for biofuels

By Erin Voegele | December 27, 2021

The U.S. EPA has announced it will host a virtual public workshop on greenhouse gas (GHG) modeling for biofuels on Feb. 28 through March 1. The agency is hosting the workshop to solicit information on the current scientific understanding of GHG modeling of land-based crop biofuels used in the transportation sector.

Information gathered through the event will be used to inform a range of current and future actions, including EPA’s methodology for quantifying GHGs under the Renewable Fuel Standard. Through the workshop, the agency said it will initiate a public process for getting input on how to incorporate the best available science into an update of its lifecycle analysis of biofuels. The event will also help the EPA determine what steps it should take next in this work area.

The EPA is specifically seeking public comments on what sources of data exist and how they can be used to inform the assumptions that drive GHG estimates; how best to characterize the sources of uncertainty associated with quantifying the GHG emissions associated with biofuels; and what models are available to evaluate the lifecycle GHG emissions of land-based biofuels and whether those models meet Clean Air Act requirements for quantifying the direct and significant indirect emissions from biofuels.

The workshop is being conducted by EPA’s Office of Transportation and Air Quality in consultation with the USDA and the U.S. Department of Energy. The agency will also accept written comments through April 1. Additional information, including a link to register for the two-day workshop, is available on the EPA website.