I 
117TH CONGRESS 
1ST SESSION H. R. 3592 
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. 
IN THE HOUSE OF REPRESENTATIVES 
MAY 28, 2021 
Mr. JOHNSON of South Dakota (for himself, Mr. RODNEY DAVIS of Illinois, 
Ms. CRAIG, Mrs. AXNE, Mr. SMITH of Nebraska, Mr. POCAN, Mr. 
FEENSTRA, Mr. HAGEDORN, Mr. BOST, Mrs. BUSTOS, Mr. BAIRD, Mr. 
EMMER, Mr. BACON, Mrs. FISCHBACH, and Mrs. HINSON) introduced the 
following bill; which was referred to the Committee on Energy and Com-
merce 
A BILL 
To require the Administrator of the Environmental Protec-
tion Agency to update the modeling used for lifecycle 
greenhouse gas assessments for corn-based ethanol and 
biodiesel, and for other purposes. 
Be it enacted by the Senate and House of Representa-
tives of the United States of America in Congress assembled, 
SECTION 1. SHORT TITLE. 
This Act may be cited as the ‘‘Adopt the Greenhouse 
gases, Regulated Emissions, and Energy use in Transpor-
tation model Act’’ or the ‘‘Adopt GREET Act’’. 
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SEC. 2. DEFINITION OF ADMINISTRATOR. 
In this Act, the term ‘‘Administrator’’ means the Ad-
ministrator of the Environmental Protection Agency. 
SEC. 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 up-
date the methodology used by the Environmental Protec-
tion Agency in lifecycle analyses with respect to green-
house 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 Adminis-
trator shall adopt the most recent Greenhouse gases, 
Regulated Emissions, and Energy use in Transpor-
tation 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 
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(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, En-
ergy and Natural Resources, and Environment and Public 
Works of the Senate and the Committees on Agriculture, 
Energy and Commerce, and Science, Space, and Tech-
nology 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 tech-
nology. 
Æ 
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