campus carbon emissions inventory: commuter contributions and campus-land offsets paul tanes...
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![Page 1: Campus Carbon Emissions Inventory: Commuter Contributions and Campus-Land Offsets Paul Tanes ptanes@bridgew.edu Darcy Boellstorff, Ph.D. dboellstorff@bridgew.edu](https://reader038.vdocuments.mx/reader038/viewer/2022110116/551a390c550346545e8b4d04/html5/thumbnails/1.jpg)
Campus Carbon Emissions Inventory: Commuter Contributions and Campus-Land OffsetsPaul Tanes
[email protected] Boellstorff, Ph.D. [email protected] Department of GeographyBridgewater State College, Bridgewater, MA
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• Public, primarily undergraduate – 10,000 students,
350 faculty• ACU Presidents
Climate Commitment (ACUPCC)– National initiative – Greenhouse gas
inventory, short term efforts and long term plans
– Service learning opportunities
Bridgewater State College (BSC) and ACUPCC
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Clean Air-Cool Planet© (CA-CP) Calculator
• Purchased electricity, steam, and chilled water
• On-campus cogeneration plant
• On-campus stationary energy use
• Transportation: Fleet and air travel
• Student commuter habits • Faculty and staff commuter
habits • Agriculture • Solid Waste • Refrigeration and other
chemicals • Emission offsets
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Commuting Profile at BSC
• 7000+ student commuters – 320+ towns in
Massachusetts and Rhode Island
– Average of 4.5 trips per week
• 3000+ summer student commuters
• 1400+ employees
Students
Faculty/Staff
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CA-CP© Inputs for Commuter Habits
– Number of students– Average fuel efficiency– Percent commuting by car
– Miles per trip– Trips per day– Days per year
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Miles Per Trip• Town hall locations to campus• Path determined by distance and
also by speed
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Trips Per Day
1. Assume all students make same number of trips per week (4.5)?
2. Trips per week varies by distance – Using the known average:
– Where: • sc = # students within 25 miles of campus,
• sm = # students 25-50 miles of campus,
• sf = # students > 50 miles of campus
• xc trips for close students
• xm for medium-distance students
• xf for far students
A
fmc
s
xsxsxs )()()(5.4 321
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Annual Commuter Contribution - Automobile• 54.2 million miles (113 round trips
to the moon) using 2.5 million gallons of gasoline
• 25,000 metric tons eCO2
– Or, the amount absorbed in a year by about 5500 acres of mature trees (24 campuses)
• Contributions not yet included– Commuter rail– College fleet– College-funded travel
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Offsets
– Renewable energy credit
– Composting – Forest
preservation
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Forest Preservation
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Forest Preservation
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Forest Preservation
• 97 acres of forest• 4.5 metric tons eCO2 per acre per
year• the campus forested land offsets
437 metric tons eCO2 per year– 1.7% of automobile commuting– Need about 5400+ acres of additional forest land
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Next Steps
• Regarding future estimates: More detailed survey information on commuters
• The big picture will show where we stand• Short-term action and long-term goals• GIS students and service-learning
– Web-mapping applications– Improved campus land use inventories
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• Clean Air-Cool Planet©, 2006. Conducting a campus greenhouse gas emissions inventory on your campus, including instructions and documentation for CA-CP Calculator v5.0
• Stavins, R. and K. Richards, 2005. The cost of U.S. forest-based carbon sequestration. Report for the Pew Center on Climate Change.
• Duke University, 2004. Greenhouse Gas Inventory.
• American College and University Presidents Climate Commitment, http://www.presidentsclimatecommitment.org/index.php
Resources