← Back to Publications Report 2019 Carbon Free Boston: Waste Technical Report An assessment of Boston’s waste-related emissions and options to reduce them. Joshua R. Castigliego, Michael J. Walsh, Adam Pollack, Cutler J. Cleveland Boston University Institute for Sustainable Energy Expand figureClose figureCarbon Free Boston Waste Technical Report, Figure 4: waste management hierarchy. Boston University.Open original imageCarbon Free Boston Waste Technical Report, Figure 4: waste management hierarchy. Boston University. This report examines Boston’s municipal solid waste system and its greenhouse gas emissions. It explains the study’s accounting framework and evaluates waste-management strategies as part of the city’s path to carbon neutrality.