S. 193Senate117th Congress (2021-2023)In Committee

Adopt GREET Act

Sponsored by John ThuneSen. John Thune (R-SD)
Introduced February 3, 2021

AI-Generated Summary

Updated February 7, 2026 at 10:07 PM UTC

The Adopt GREET Act directs the EPA Administrator to refresh the greenhouse‑gas lifecycle analysis methods used for corn‑based ethanol and biodiesel. It requires the agency to adopt the latest GREET model within 90 days of enactment and to repeat updates every five years. The bill affects EPA’s emissions modeling and, indirectly, producers and users of these biofuels.

Key Provisions

  • Within 90 days of the law’s passage, the EPA must update its lifecycle GHG methodology for corn ethanol and biodiesel, using the most recent GREET model developed by Argonne National Laboratory.
  • The EPA must repeat this methodology update every five years, either continuing to use GREET or another appropriate method it determines.
  • If the EPA misses a scheduled update, it must report to relevant Senate and House committees explaining the delay and why the previous method may still be current.

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: S320)

February 3, 2021

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SenateIntro Referral

Introduced in Senate

February 3, 2021

SenateIntro Referral

Read twice and referred to the Committee on Environment and Public Works. (text: S320)

February 3, 2021

Floor Debate

2 members

What members said about S. 193 on the floor

1 Republican1 Democrat
Ron Wyden
Sen. Ron WydenD-OR · Feb 3, 2021

Mr. President, today I am introducing the River Democracy Act of 2021, to add 4,702 miles of rivers and streams in Oregon to the national Wild and Scenic Rivers system to protect the recreational…

John Thune
Sen. John ThuneR-SD · Feb 3, 2021

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

Bill Text

Latest available legislative text

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Introduced in SenateIssued February 3, 2021

II

117th CONGRESS

1st Session

S. 193

IN THE SENATE OF THE UNITED STATES

February 3, 2021

Mr. Thune (for himself, Ms. Klobuchar, Mr. Durbin, Ms. Ernst, Mr. Grassley, Mr. Rounds, and Ms. Baldwin) 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 and 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 corn-based ethanol and 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.