Bill H.3983 An Act to Create a 2050 Roadmap to a Clean and Thriving Commonwealth

Sponsor: Representative Joan Meschino


The science is clear: to avoid the devastation of irreversible climate change, we must cut our carbon pollution to net zero by 2050. The 2050 Roadmap Bill is the ambitious legislation we need to ensure Massachusetts meets its climate goals while keeping people and jobs front and center. The 2050 Roadmap Bill includes crucial, front-loaded milestones and time-lines to ensure we’re making permanent progress starting now





Summary: H.3983, An Act to Create a 2050 Roadmap to a Clean and Thriving Commonwealth 

-- Updates the Global Warming Solutions Act’s 2050 limit to net-zero greenhouse gas emissions. 

-- Creates a comprehensive, people-centered plan to reach our climate goal.

-- Creates new accountability for public health impacts, particularly those that may affect low-income or environmental justice populations.

-- Gives the administration additional tools and resources to fight climate change. 


This bill is a critical update to the state’s landmark Global Warming Solutions Act. The 2050 Roadmap Bill requires use of the latest science and proven modeling methods to create a comprehensive plan to reach net-zero greenhouse gas emissions by 2050 or earlier. It also adds new accountability — holding state agencies accountable to the legislature and to the people of Massachusetts for implementing that plan. 

To reach our climate goals, human-caused greenhouse gas (GHG) emissions — including those from fossil-fueled vehicles and factories — must be reduced as close to zero as possible. Any remaining GHG’s must be balanced with an equivalent amount of carbon removal, for example by restoring forests or through direct air capture and storage technology.


All sectors must be involved, to achieve this transformation.

By following the science, using proven analysis methods including backcasting, and supporting communities  along the way, Massachusetts can thrive as we transform all sectors of our energy economy to prevent the worst impacts of climate change. 

Massachusetts has been on the forefront of progressive climate action for years, and we must keep making progress. By creating a concrete and comprehensive plan to combat climate change before it’s too late, we can ensure the future of Massachusetts for our children and grandchildren.

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