An Act for greenhouse gas measuring and accounting truth
Generates a plain-language summary of the bill text and history.
| Date | Branch | Action |
|---|---|---|
| 4/6/2026 | House | Accompanied a study order, see H5323↗ |
| 12/4/2025 | House | Reporting date extended to Wednesday, March 18, 2026 |
| 10/17/2025 | Joint | Hearing scheduled for 10/29/2025 from 01:00 PM-05:00 PM in A-1 |
| 2/27/2025 | Senate | Senate concurred |
| 2/27/2025 | House | Referred to the committee on Telecommunications, Utilities and Energy |
No additional cosponsors.
| Committee | Recommendation | Vote |
|---|---|---|
| J37 | Accompanied | — |
Section 1 of chapter 21N of the General Laws, as appearing in the 2022 Official Edition, is hereby amended by striking out the definition of “Statewide greenhouse gas emissions” and inserting in place thereof the following definition:- ''Statewide greenhouse gas emissions'', the total annual emissions of greenhouse gasses in the commonwealth, including all emissions of greenhouse gasses from the generation of electricity and the distribution and use of gas delivered to and consumed in the commonwealth, accounting for electric transmission and distribution line losses, and accounting for losses of gas in the commonwealth in transmission, storage, distribution, and use by consumers, whether the electricity is generated or the gas is produced in the commonwealth or imported; provided, however, that statewide greenhouse gas emissions shall be expressed in tons of carbon dioxide equivalents for both a timeframe of 20 years and for a timeframe of 100 years.
Section 2 of said chapter 21N is hereby amended by striking out subsection (c) and inserting in place thereof the following:- (c) The department shall annually publish a state greenhouse gas emissions inventory that includes comprehensive estimates and measurements as available of the quantity of greenhouse gas emitted in the commonwealth for the last years in which data is available; provided, (i) that the inventory shall use a timeframe of 20 years to calculate the global warming impact of short-acting greenhouse gasses and a timeframe of 100 years to calculate the global warming impact of long-acting greenhouse gasses; and (ii) that updated emissions factors, carbon dioxide equivalencies, and accounting methods shall be applied retroactively to 1990. If such updates are not consistent with federal and other reporting requirements, the department shall report two statewide greenhouse gas emissions results side-by-side: (i) the results of the updated method using data specific to the commonwealth and the best available science and data including separation of short-acting and long-acting greenhouse gasses, and (ii) the results of the alternate accounting method required by federal or other entities.
: Said Chapter 21N is hereby amended by adding the following section:-
The department shall require ongoing monitoring of greenhouse gas emissions in the commonwealth using (i) statistically significant sampling methods and locations; (ii) continuous or near continuous direct measurements of atmospheric greenhouse gas emissions with significant environmental impact, including but not limited to carbon dioxide, methane, nitrous oxide and hydrofluorocarbons; and (iii) the best available scientific methodology. Such monitoring shall be conducted by a qualified independent contractor chosen jointly by the department and the secretary. Emissions data collected shall be: (i) publicly available for research; (ii) compared annually to the emissions data in the greenhouse gas emissions inventory established pursuant to section 2(c) of this chapter; and (iii) analyzed to evaluate the source of any significant difference between emissions data collected under this section and emissions data reported under section 2(c).The department shall report such analysis with the statewide greenhouse gas emissions inventory.
SECTION 1. Section 1 of chapter 21N of the General Laws, as appearing in the 2022 Official Edition, is hereby amended by striking out the definition of “Statewide greenhouse gas emissions” and inserting in place thereof the following definition:- ''Statewide greenhouse gas emissions'', the total annual emissions of greenhouse gasses in the commonwealth, including all emissions of greenhouse gasses from the generation of electricity and the distribution and use of gas delivered to and consumed in the commonwealth, accounting for electric transmission and distribution line losses, and accounting for losses of gas in the commonwealth in transmission, storage, distribution, and use by consumers, whether the electricity is generated or the gas is produced in the commonwealth or imported; provided, however, that statewide greenhouse gas emissions shall be expressed in tons of carbon dioxide equivalents for both a timeframe of 20 years and for a timeframe of 100 years. SECTION 2. Section 2 of said chapter 21N is hereby amended by striking out subsection (c) and inserting in place thereof the following:- (c) The department shall annually publish a state greenhouse gas emissions inventory that includes comprehensive estimates and measurements as available of the quantity of greenhouse gas emitted in the commonwealth for the last years in which data is available; provided, (i) that the inventory shall use a timeframe of 20 years to calculate the global warming impact of short-acting greenhouse gasses and a timeframe of 100 years to calculate the global warming impact of long-acting greenhouse gasses; and (ii) that updated emissions factors, carbon dioxide equivalencies, and accounting methods shall be applied retroactively to 1990. If such updates are not consistent with federal and other reporting requirements, the department shall report two statewide greenhouse gas emissions results side-by-side: (i) the results of the updated method using data specific to the commonwealth and the best available science and data including separation of short-acting and long-acting greenhouse gasses, and (ii) the results of the alternate accounting method required by federal or other entities. SECTION 3: Said Chapter 21N is hereby amended by adding the following section:- Section 13. The department shall require ongoing monitoring of greenhouse gas emissions in the commonwealth using (i) statistically significant sampling methods and locations; (ii) continuous or near continuous direct measurements of atmospheric greenhouse gas emissions with significant environmental impact, including but not limited to carbon dioxide, methane, nitrous oxide and hydrofluorocarbons; and (iii) the best available scientific methodology. Such monitoring shall be conducted by a qualified independent contractor chosen jointly by the department and the secretary. Emissions data collected shall be: (i) publicly available for research; (ii) compared annually to the emissions data in the greenhouse gas emissions inventory established pursuant to section 2(c) of this chapter; and (iii) analyzed to evaluate the source of any significant difference between emissions data collected under this section and emissions data reported under section 2(c).The department shall report such analysis with the statewide greenhouse gas emissions inventory.