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Climate and Energy

Devens is a unique community with bold goals. As a thriving center of industry and innovation, Devens has taken action to ensure that it grows while taking care of the environment. Devens may be small, but it has big goals that are right in line with the Paris Climate Agreement and the State of Massachusetts.

This graphic shows that, according to a community-wide greenhouse gas inventory, 94% of GHG emissions in Devens come from buildings, 5% comes from transportation, and less than 1% of emissions come from wastewater treatment, solid waste, and water delivery.

GHG Emissions

2015 Greenhouse Gas Inventory

Planning for resilience in the face of climate change requires not just considering climate threats but also the contribution we make to driving additional change. 

The first step is to account for all the greenhouse gases (GHGs) that the Devens community is responsible for through a GHG inventory. To support this plan, Devens conducted an inventory for calendar year 2015, which had the most complete data available. 

In total, activities by residents, visitors, and workers in Devens resulted in 96,054 metric tons of CO2e. It would take 1.5 million tree seedlings growing for 10 years to offset our emissions from a single year.

GHG Emissions

Devens is a unique community with a unique GHG profile. Whereas other communities have a more even balance of energy use and emissions across sectors, Devens profile reflects the mix of activities that happen here today, which is dominated by building energy.

While this creates significant opportunities to reduce emissions from industry today, it will be important to watch growth in transportation, waste, and energy use in other sectors as the community continues to develop.

GHG Emissions

Building Energy GHGs

A closer look at GHGs from energy across sectors reveals additional opportunities for savings. A key strategy to reduce overall emissions is to shift energy sources away from direct fossil fuel use, like by switching from natural gas to electricity. As the electric grid becomes cleaner, emissions from electricity use will come down as well, even as we start to use more electricity.

Currently, natural gas GHGs exceed those from electricity in the residential, commercial, and institutional facilities across Devens. 

GHG Emissions

Low Carbon Economy

Devens is a growing producer community. One way to measure its progress with respect to climate change is to measure economic carbon intensity. Through cleaner energy supplies and energy efficiency, Devens becomes a more attractive location for businesses who share the community's climate and environmental goals.

Compared to the State of Massachusetts as a whole, Devens's economic engine is less carbon intensive for the value of what is produced here, providing a good example that economic development and low carbon development can happen simultaneously.

State of Massachusetts Carbon Intensity from U.S. Energy Information Administration. (2019). Carbon Intensity of the Economy by State (2005-2016)

The graphic displays how carbon intensity is calculated, by measuring carbon dioxide equivalent (in metric tons) and dividing it by a community's GDP (in millions of dollars).

GHG Emissions

Economic Carbon Intensity

Carbon intensity measured in metric tons of carbon dioxide equivalent (MTCO2e) per million dollars of GDP (Million $ GDP) is a performance indicator that can tell us about efficiency in addition to total emissions. As Devens grows, the denominator of this value will grow. Whether GHGs grow at the same rate or shrink will be a key metric for demonstrating how well Devens is transforming to a low carbon community.

GHG Emissions

Greenhouse gas emissions from Devens' municipal operations are similar to other local governments, with buildings and facilities as the largest contributor followed by wastewater, fleet vehicles, potable water pumping, employee commute, and streetlights.

In Devens, the 2nd largest source is from wastewater treatment, which includes both the energy needed to move large volumes of water but also the emissions from the wastewater treatment process itself.

GHG Emissions

Energy use is generally the largest source of GHGs and it is used for a variety of different purposes across our municipal services. Energy to run and heat buildings, light our streets, pump water and wastewater, and to power our vehicles all contribute to the GHGs emitted from our municipal operations.

Just as at the community scale, the greatest opportunity to reduce GHGs from Devens' municipal operations is by minimizing energy use, but also shifting its energy to electricity and renewable sources. More electric vehicles will shift energy away from gasoline and diesel, and efficiency improvements can minimize gas use for heating.

A solar array located in Devens is pictured.

Renewable Energy Development

Greening the Grid

Devens has a green advantage because it has control over its energy mix through its municipal utility. Devens sources its electricity supply to obtain clean energy while ensuring low costs to residents and businesses.

Currently 10% of Devens' supply mix comes from renewable sources compared to the 9% average for the electricity grid in New England as a whole. What is exceptional for Devens is that a substantial portion of the renewable energy mix comes from over 10 MW of solar energy resources developed in and around the community.