The proposal approved Wednesday allows compressed natural gas and liquefied natural gas produced using biogas from landfills, sewage treatment plants and other sources to qualify as cellulosic biofuel.
Under the new scheme, electricity generated from biogas and used to power electric vehicles would also qualify to meet the cellulosic portion of the federal biofuel mandate.
In a statement the agency said, "These pathways have the potential to provide notable volumes of cellulosic biofuel for use in complying with the (Renewable Fuel Standard) program, since significant volumes of advanced biofuels are already being generated for fuel made from biogas."
The EPA also finalized a voluntary quality assurance program to help prevent the sale of fraudulent biofuel credits. The new program will use independent, third party audits to ensure the credits are legitimate.
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