Maine: Emissions and Emissions Reduction Targets

SOURCE: ENE analysis using EPA State Inventory Tool and State Greenhouse Gas Emissions Targets

This chart shows state emissions trends (historical and projected) and emissions reduction targets, offering a picture of Maine’s progress to date.

This chart shows total greenhouse gas emissions by sector, and tracks emissions trends in Maine from 1990 through 2010.

This chart presents Maine’s generation mix in 2001 and 2011, and depicts a shift toward hydroelectric and other renewables.

Overall state emissions have declined in the last decade, but transportation emissions have increased.

This chart compares motor gasoline emissions to forest sequestration/emissions in 2000 and 2010 to demonstrate how forests either add to or offset emissions.

All eight northeastern states have emissions reduction targets. In order to compare emissions trends with long-term targets, ENE extended EPA State Inventory Tool emissions projections out to 2050. According to ENE analysis and inventory data, Maine met its 2010 target, but will likely fall short of its 2020 and longer-term targets.

As part of ClimateVision 2020, ENE completed comprehensive greenhouse gas inventories for the eight northeastern states. Maine’s total emissions were higher between 1998 and 2008, before stabilizing close to 1990 levels by 2010. Electric power emissions declined substantially in recent years, whereas transportation sector emissions have remained the largest contributor to total state emissions for the last two decades. Further, transportation emissions now account for 42% of Maine’s emissions, up from 32% ten years ago - largely because overall state emissions have declined but transportation emissions have slightly increased. Maine’s in-state generation portfolio has shifted over the last decade. Wind and hydroelectric make up a larger percentage of the portfolio mix in 2011 relative to 2001, while the proportion of natural gas and petroleum declined. 

The amount of carbon dioxide either stored or emitted by forests each year fluctuates according to harvest practices and changes in land use.  While Maine forests were a source of emissions during 1990-2001, they are now removing enough to offset over 100% of all motor gasoline emissions in the state.