Reducing GHG Emissions Under Section 3(d) of the Global Warming Solutions Act

These MassDEP regulations set specific, annually declining limits on greenhouse gas (GHG) emissions from a range of sources to meet the requirements of Section 3(d) of the Global Warming Solutions Act (GWSA).

Global Warming Solutions Act Dashboard

Learn about the progress Massachusetts is making toward its clean energy and climate protection goals.

Greenhouse Gas (GHG) Emissions in Massachusetts

Learn about statewide levels in 1990, projections for 2020 without additional restrictions, and required reporting of facility emissions data to guide state target-setting and progress measurement.

Progress Toward Massachusetts Clean Energy & Climate Goals

Massachusetts is proof that striving for reductions in greenhouse gas emissions doesn't hinder economic progress.

Massachusetts Greenhouse Gas Emissions Reporting Program

Reporting of greenhouse gas emissions provides data that is important for developing emission reduction targets and plans, and for measuring progress toward goals.

Massachusetts & the Regional Greenhouse Gas Initiative (RGGI)

In January 2007, Massachusetts joined the Regional Greenhouse Gas Initiative (RGGI), a cooperative effort by Northeast and Mid-Atlantic states to reduce emissions of carbon dioxide, a greenhouse gas that contributes to global climate change. To address this important environmental issue, RGGI and its member states have developed a regional strategy for controlling emissions, including a market-based, multi-state cap-and-trade program that requires electric power generators to reduce their emissions of carbon dioxide.

Clean Energy Standard (310 CMR 7.75)

Consistent with the Clean Energy and Climate Plan, and its requirement that Massachusetts achieve an 80 percent reduction in GHG emissions by 2050, MassDEP is implementing a Clean Energy Standard (CES).
MassDEP has established a regulatory cap on GHG emissions from large power plants in the state.

Reducing Non-Energy Greenhouse Gas Emissions

Information on Stationary Equipment Refrigerants SF6 and semiconductor manufacturers.

Reducing Sulfur Hexafluoride Emissions from Gas-Insulated Switchgear (310 CMR 7.72)

Sulfur Hexafluoride is a potent greenhouse gas contained in electrical system equipment. Reducing leaks of this gas is an important part of the Massachusetts plan for achieving Global Warming Solutions Act (GWSA) emissions reduction targets.

Transportation Programs

Learn more about MassDEP's transportation programs and initiatives that help reduce greenhouse gas emissions

How to Get Involved

Contribute your ideas to state greenhouse gas policy discussions and take steps to reduce your personal, household and community carbon footprints.

United States Climate Alliance

A voluntary coalition of states - including Massachusetts - committed to achieving reductions in greenhouse gas (GHG) emissions, consistent with the goals of the Paris Agreement.