Climate change is a shift in long-term weather patterns influenced by fossil fuel combustion and other activities that increase atmospheric concentrations of greenhouse gases. Learn more.

Global Warming Solutions Act

The Global Warming Solutions Act (GWSA), signed by Governor Patrick in August of 2008, created a framework for reducing heat-trapping emissions to levels that scientists believe give us a decent chance of avoiding the worst effects of global warming. It requires reductions from all sectors of the economy to reach a target of a 25% reduction of Greenhouse Gas (GHG) emissions by 2020 and an 80% reduction by 2050.

Global Warming Solutions Act Dashboard

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

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.

MassDEP Clean Energy Standard

Consistent with the Clean Energy and Climate Plan, and its requirement that Massachusetts achieve an 80 percent reduction in GHG emissions by 2050, MassDEP intends to implement a Clean Energy Standard (CES).

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.

Reduce Your Carbon Footprint at Home

Ten simple steps you can take to lower your personal and household emissions of carbon dioxide, the leading contributor to climate change.