(1) CARBON SCORE.—The term ‘‘carbon score’’ 
means the projected net greenhouse gas emissions 
that would result— 
(A) from the enactment and implementa-
tion of a bill or resolution; and 
(B) if the amounts authorized to be appro-
priated, or otherwise made available, in the bill 
or resolution were fully appropriated. 
(2) DIRECTOR.—The term ‘‘Director’’ means 
the Director of the Congressional Budget Office. 
(3) GREENHOUSE GAS.—The term ‘‘greenhouse 
gas’’ has the meaning given the term in section 
211(o)(1) of the Clean Air Act (42 U.S.C. 
7545(o)(1)). 
(4) NET
GREENHOUSE
GAS
EMISSIONS.—The 
term ‘‘net greenhouse gas emissions’’ means the net 
quantity of all greenhouse gases emitted into the at-
mosphere, including emissions by sources and re-
movals by sinks, where the total quantity of emis-
sions for each gas is expressed as a carbon dioxide 
equivalent. 
SEC. 3. CARBON SCORE. 
(a) IN GENERAL.—In carrying out section 402 of the 
Congressional Budget Act of 1974 (2 U.S.C. 653), the Di-
rector shall include in the analysis submitted to the appro-
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priate committee of Congress the carbon score of each 
public bill or resolution. 
(b) NET GREENHOUSE GAS EMISSIONS BASELINE.— 
In calculating the carbon score under subsection (a), the 
Director shall base any calculation of the increase or de-
crease of the level of greenhouse gas emissions on a com-
parison with the level of greenhouse gas emissions occur-
ring under current law. 
(c) SCOPE OF CALCULATED EMISSIONS.—In calcu-
lating the carbon score under subsection (a), the Director 
shall consider all likely changes in net greenhouse gas 
emissions, including— 
(1) any changes to net greenhouse gas emis-
sions that would directly result from activities re-
quired to carry out the bill or resolution; and 
(2) any changes to net greenhouse gas emis-
sions that would— 
(A) indirectly result from activities re-
quired to carry out the bill or resolution; and 
(B) not otherwise have occurred. 
(d) ESTABLISHED BEST PRACTICES.—In calculating 
the carbon score under subsection (a), the Director shall, 
to the maximum extent practicable, use established best 
practices for estimating emissions, such as— 
(1) lifecycle analysis; and 
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(2) internationally recognized methodologies 
(such as guidelines from the International Panel on 
Climate Change). 
(e) TIMELINE.—The Director shall calculate the car-
bon score under subsection (a) on the same timeline as 
the Director carries out the analysis under section 402 
of the Congressional Budget Act of 1974 (2 U.S.C. 653). 
SEC. 4. AUTHORIZATION OF APPROPRIATIONS. 
There are authorized to be appropriated to the Direc-
tor such sums as are necessary to develop the expertise 
and capacity required to carry out the analyses required 
under section 3. 
Æ 
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