S. 3055Senate118th Congress (2023-2025)In Committee

Adopt GREET Act

Sponsored by John ThuneSen. John Thune (R-SD)
Introduced October 17, 2023

AI-Generated Summary

Updated January 20, 2026 at 12:17 PM UTC

The Adopt GREET Act requires the EPA Administrator to update the modeling used for lifecycle greenhouse‑gas (GHG) assessments of fuel pathways covered by the Renewable Fuel Standard. Within 90 days of the law’s passage and then every five years, the EPA must adopt the latest GREET model from Argonne National Laboratory, or another appropriate methodology, for evaluating GHG emissions. The rule applies to existing approved fuel pathways and any new pathways that receive a “D” code after the law takes effect, affecting biofuel producers, regulators, and the broader transportation fuel market.

Key Provisions

  • Within 90 days of enactment, the EPA must adopt the most recent GREET model for lifecycle GHG analysis of approved fuel pathways.
  • Every five years thereafter, the EPA must update the methodology, either by continuing to use GREET or by adopting another suitable approach.
  • For any new fuel pathway receiving a “D” code after the law’s passage, the EPA must apply the GREET methodology within 90 days of the code assignment.
  • If the EPA fails to meet the update deadlines, it must report the reasons to the relevant Senate and House committees.

Legislative Activity

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1 earlier action
SenateIntro Referral Latest Action

Read twice and referred to the Committee on Environment and Public Works. (text: CR S5051)

October 17, 2023

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SenateIntro Referral

Introduced in Senate

October 17, 2023

SenateIntro Referral

Read twice and referred to the Committee on Environment and Public Works. (text: CR S5051)

October 17, 2023

Floor Debate

1 member

What members said about S. 3055 on the floor

1 Republican
John Thune
Sen. John ThuneR-SD · Oct 17, 2023

Madam President, I ask unanimous consent that the text of the bill be printed in the Record.

John Thune
Sen. John ThuneR-SD · Oct 17, 2023

Madam President, I ask unanimous consent that the text of the bill be printed in the Record.

Bill Text

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Introduced in SenateIssued October 17, 2023

II

118th CONGRESS

1st Session

S. 3055

IN THE SENATE OF THE UNITED STATES

October 17, 2023

Mr. Thune (for himself, Ms. Klobuchar, Mr. Brown, Ms. Duckworth, Mr. Durbin, Ms. Ernst, Mrs. Fischer, Mr. Grassley, Mr. Marshall, Mr. Ricketts, and Mr. Rounds) 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 approved fuel pathways under the Renewable Fuel Standard, 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 for approved fuel pathways

(a)

In general

Subject to subsection (b), not later than 90 days after the date of enactment of this Act, and not later than 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 a fuel pathway to which a D code has been assigned pursuant to a petition described in section 80.1416 of title 40, Code of Federal Regulations (or successor regulations), that has been approved by the Administrator.

(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).

(3)

Establishment of fuel pathways

For any fuel pathway to which the Administrator assigns a D code pursuant to a petition described in section 80.1416 of title 40, Code of Federal Regulations (or successor regulations), that is approved by the Administrator after the date of enactment of this Act, the Administrator shall, not later than 90 days after the date on which the Administrator assigns that code, adopt the methodology described in paragraph (1) for purposes of modeling lifecycle analyses with respect to greenhouse gas emissions that result from that fuel pathway.

(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.