MA Decarbonization Roadmap

To achieve long-term emission reduction goals within the Commonwealth, the Executive Office of Energy and Environmental Affairs is undertaking a planning process to identify cost-effective and equitable strategies to ensure Massachusetts reduces greenhouse gas emissions by at least 85% by 2050 and achieves net-zero emissions.

Table of Contents

Final Reports


MA 2050 Decarbonization Roadmap Cover Page

The Decarbonization Roadmap final reports were published in December, 2020.  Details on webinar and public engagement opportunities are below.

The Massachusetts 2050 Decarbonization Roadmap is available here in the following forms:

The supporting technical reports can be found here by clicking on the images (links also available in the Additional Resources Section at the bottom of this page):


Roadmap Study Data

Please contact to request access to data resources from the Roadmap Study.  However, the energy pathways analysis has since been updated to inform the Clean Energy and Climate Plan for 2025 and 2030 and the Clean Energy and Climate Plan for 2050.  A workbook of the updated energy modeling results is available at and

Public Engagement

EEA hosted a Q&A Webinar to discuss and answer questions on the final 2050 Roadmap on Friday, January 15 2021. 

Please sign up here to receive email alerts around the 2050 Roadmap and 2030 CECP.  

EEA is working with stakeholders across the Commonwealth to ensure that development of the Massachusetts Decarbonization Roadmap to 2050 ("2050 Roadmap") is an inclusive policy planning effort. Stakeholders participating in this process include: the GWSA Implementation Advisory Committee (IAC), a Technical Steering Committee of local academic experts, community organizations, Environmental Justice organizations and communities, regional planning authorities, and other stakeholders to be identified. Additionally, public engagement will be an important component in the development of the roadmap, and there will be opportunities for public input. General feedback on the study can be submitted using this form at any time. 

EEA had planned several in-person public meetings through March, 2020.  Meetings were held in Worcester and Fall River, but out of precaution for COVID-19, the meetings in Roxbury, Pittsfield, Springfield, Lowell, and Bunker Hill/Boston were canceled.  On March 27th, EEA held a public webinar with over 200 attendees. Meeting and webinar recordings, slides, and webinar comments are linked below.  

In December 2020, EEA held a public webinar providing an update on the process for the 2050 Roadmap and 2030 CECP.  The webinar video and materials are linked below.  

Additional Resources

2050 Emissions Limit: Letter of Determination

The 2030 Emissions Limit Letter of Determination is available at This section details the process of setting the 2050 Net Zero Emissions Limit.

On February 26, 2020, EEA released a Draft Letter of Determination with proposed language to set a 2050 greenhouse gas emissions (GHG) limit. [Note: typo clarified in 3/4/2020 updated file]. This limit is designed to achieve net-zero GHG emissions, which Governor Baker announced during the State of the Commonwealth address on January 21, 2020. As announced in a press release, stakeholders were invited to submit written comments on the draft determination letter through 5pm on April 10, 2020. The comment period is now closed, though general feedback on the decarbonization roadmap is welcome using this form at any time.  EEA received extensive comments, including verbal and written comments at public meetings and webinar held in March 2020, as well as written comments submitted. Over 200 individual comments were received through and online form or via email, with another 633 comments received from Sierra Club members.

On Earth Day, April 22nd 2020, as announced in a press release, EEA Secretary Theoharides signed the Letter of Determination, setting the 2050 emissions limit as follows:

A level of statewide greenhouse gas emissions that is equal in quantity to the amount of carbon dioxide or its equivalent that is removed from the atmosphere and stored annually by, or attributable to, the Commonwealth; provided, however, that in no event shall the level of emissions be greater than a level that is 85 percent below the 1990 level.


Additional Resources

Background Information

Signed into law in 2008, the Global Warming Solutions Act (GWSA) established a statutory framework for the Commonwealth to set statewide Greenhouse Gas (GHG) emissions reduction limits, 25% by 2020 and at least 80% by 2050 below 1990 levels, and developed implementation plans to achieve emission reductions.

The GWSA also required the Executive Office of Energy and Environmental Affairs (EEA), in developing the Clean Energy and Climate Plans (CECP), to consider the total potential costs and economic and non-economic benefits of GHG emissions reduction measures to the economy, environment and public health, using the best available economic models, emissions estimation techniques, and other scientific methods. Additionally, Governor Baker's Executive Order 569 lays out a comprehensive approach to further reduce greenhouse gas emissions, safeguard residents, municipalities, and businesses from the impacts of climate change, and build a more resilient Commonwealth. It requires coordination of GHG mitigation policies with climate change adaptation policies.

EEA is in the process of implementing the strategies and recommendations included in the 2050 Roadmap. The "no-regrets" strategy of regional coordination is being pursued through several avenues, including the New England Energy Vision. MA is part of the 6 New England states collaborating to advance a clean, affordable, and reliable 21st century regional electric grid. More information is available at

Research Effort

EEA has developed a roadmap to 2050 that identifies the strategies, policies, and implementation pathways for MA to achieve at least 85% GHG reductions by 2050, including multiple pathways to net-zero emissions. The 2050 Roadmap has informed the setting of the 2030 emissions limit and the development of the Interim CECP for 2030.

Analysis supporting the roadmap examines ways to decarbonize the buildings, transportation, electricity, and non-energy sectors; the role the Commonwealth's natural and working lands can play in decreasing greenhouse gas emissions; and the impacts of policy implementation, including:

  • Impacts to Environmental Justice (EJ) communities;
  • Economic costs and benefits;
  • Public health impacts;
  • Changes to the landscape; and
  • Co-benefits for climate change resilience.


The planning process to develop the Roadmap kicked-off in July 2019.  Analysis continue through 2020, with the 2050 Roadmap and the CECP for 2030  published in December 2020.

Feedback and Resources

EEA has several ways to stay engaged with this work:

Sign up here to receive email alerts about upcoming webinars, meetings, and more.

Attend a public meeting

GWSA public meetings are all published on the calendar here.

Provide feedback

Do you have questions or ideas for the study?  Fill out this form to contribute to the effort! 

Additional Resources

Final Reports Full Links

Direct links to full Roadmap report below

Additional Resources

Help Us Improve  with your feedback

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