Northeast
Maine
Maine was the first state to set greenhouse gas reduction targets in 2003, and emissions decreased by 17% between 1990 and 2022. Transportation is the highest-emitting sector, primarily due to the geographically spread-out population. While renewables fuel two thirds of in-state electricity generation, around 50% of households use petroleum products for home heating, a higher share than any other state.
GHG Reduction Targets
All targets relative to 1990
levels
2030
45%
2045
Carbon neutral
Governor
Janet T. Mills (Democrat)
Governor
Janet T. Mills (Democrat)
House Party
Democratic Majority
House Party
Democratic Majority
Senate Party
Democratic Majority
Senate Party
Democratic Majority
Legislative session
12/4/24 - 6/18/25
US Climate Alliance Status
Member
31
36
Northeast
9 states
This map shows the occurrence of climate policies passed at the state-level. Higher numbers represent more climate policies enacted.
Progress by Policy Area
- Enacted Enacted policies have been passed or established in a state by a governing body via legislation, executive orders, rules, regulations, and/or other program creation, and remain in effect.
- In-progress In progress policies have been established in a state, but final regulations, rules, or plans are pending final approval. This also includes legislation and executive orders that require regulations to be put into effect.
- Partially Enacted Partially enacted policies have been enacted in the state, but are missing one or more policy components. Dashboard policies cannot be considered partially enacted unless policy components are available.
- Not Enacted Not enacted policies have not been passed or established in the state or are no longer in effect.
The colored bars indicate the status for each policy on the Dashboard, viewed across seven policy areas.
Greenhouse Gas Emissions Projections in Maine
Created in partnership with
Climate Policies in Maine
Filters
| Status | Policy | Policy Area | Policy Category | Year Enacted | |
|---|---|---|---|---|---|
| Enacted |
Empty column
Efficiency Maine Green Bank Establishing Policies
|
Cross-Sector
|
Climate Finance | 2021 | |
| Enacted |
Empty column
Maine’s public employee retirement system (MainePERS) is required to to divest from fossil-fuel stocks, bonds, and private equity financing by 2026. The state treasurer is directed to do the same with other state funds. Establishing Policies
|
Cross-Sector
|
Climate Finance | 2021 | |
| Enacted |
Empty column
The Regional Greenhouse Gas Initiative (RGGI) covers the electricity sector. Establishing Policies
|
Cross-Sector
|
Carbon Valuation | 2005 | |
| Not Enacted |
Empty column
The social cost of carbon is a monetary estimate of the damage of each ton of greenhouse gases emitted. The social cost of carbon is used to quantify and monetize climate damages, representing the net economic cost of climate pollution to society. |
Cross-Sector
|
Carbon Valuation |