II 116th CONGRESS 2d Session S. 4481 IN THE SENATE OF THE UNITED STATES August 6, 2020 Mr. Thune (for himself, Mr. Rounds , Mr. Grassley , and Ms. Ernst ) introduced the following bill; which was read twice and referred to the Committee on Environment and Public Works A BILL To require the Administrator of the Environmental Protection Agency to update the modeling used for lifecycle greenhouse gas assessments for corn-based ethanol and biodiesel, and for other purposes.

1. Short title This Act may be cited as the Adopt the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation Model Act or the Adopt GREET Act . 2. Definition of Administrator In this Act, the term Administrator means the Administrator of the Environmental Protection Agency. 3. Lifecycle greenhouse gas emissions from corn-based ethanol (a) In general Subject to subsection (b), not later than 90 days after the date of enactment of this Act, and every 5 years thereafter, the Administrator shall update the methodology used by the Environmental Protection Agency in lifecycle analyses with respect to greenhouse gas emissions that result from corn-based ethanol. (b) Requirements (1) First update In carrying out the first update required under subsection (a), the Administrator shall adopt— (A) the most recent Greenhouse gases, Regulated Emissions, and Energy use in Transportation model (commonly referred to as the GREET model ) developed by Argonne National Laboratory; or (B) the methodology described in the study by the Office of the Chief Economist of the Department of Agriculture entitled The greenhouse gas benefits of corn ethanol–assessing recent evidence and published on March 25, 2019. (2) Subsequent updates In carrying out the second and each subsequent update required under subsection (a), the Administrator shall— (A) as necessary, adopt, review, or update a methodology determined to be appropriate by the Administrator; or (B) adopt a methodology described in subparagraph (A) or (B) of paragraph (1). (c) Report If the Administrator fails to carry out subsection (b)(2) before the applicable deadline described in subsection (a), the Administrator shall submit to the Committees on Agriculture, Nutrition, and Forestry, Energy and Natural Resources, and Environment and Public Works of the Senate and the Committees on Agriculture, Energy and Commerce, and Science, Space, and Technology of the House of Representatives a report describing the reasons for the failure to carry out subsection (b)(2), which may include a determination by the Administrator that the methodology adopted or updated in a previous update under subsection (a) remains the most current methodology based on available data, research, and technology. 4. Lifecycle greenhouse gas emissions from biodiesel (a) In general Subject to subsection (b), not later than 90 days after the date of enactment of this Act, and every 5 years thereafter, the Administrator shall update the methodology used by the Environmental Protection Agency in lifecycle analyses with respect to greenhouse gas emissions that result from biodiesel. (b) Requirements (1) First update In carrying out the first update required under subsection (a), the Administrator shall adopt the most recent Greenhouse gases, Regulated Emissions, and Energy use in Transportation model (commonly referred to as the GREET model ) developed by Argonne National Laboratory. (2) Subsequent updates In carrying out the second and each subsequent update required under subsection (a), the Administrator shall— (A) as necessary, adopt, review, or update a methodology determined to be appropriate by the Administrator; or (B) adopt the methodology described in paragraph (1). (c) Report If the Administrator fails to carry out subsection (b)(2) before the applicable deadline described in subsection (a), the Administrator shall submit to the Committees on Agriculture, Nutrition, and Forestry, Energy and Natural Resources, and Environment and Public Works of the Senate and the Committees on Agriculture, Energy and Commerce, and Science, Space, and Technology of the House of Representatives a report describing the reasons for the failure to carry out subsection (b)(2), which may include a determination by the Administrator that the methodology adopted or updated in a previous update under subsection (a) remains the most current methodology based on available data, research, and technology.