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Because of increasing concern about global climate change and carbon emissions as a causal factor, many companies and organizations are pursuing "carbon footprint" projects to estimate their own contributions to global climate change. Protocol definitions from carbon registries help organizations analyze their footprints. The scope of these protocols varies(More)
This study estimates the life cycle greenhouse gas (GHG) emissions from the production of Marcellus shale natural gas and compares its emissions with national average US natural gas emissions produced in the year 2008, prior to any significant Marcellus shale development. We estimate that the development and completion of a typical Marcellus shale well(More)
Materials flow analysis models have traditionally been used to track the production, use, and consumption of materials. Economic input-output modeling has been used for environmental systems analysis, with a primary benefit being the capability to estimate direct and indirect economic and environmental impacts across the entire supply chain of production in(More)
Plug-in hybrid electric vehicle (PHEV) technology has the potential to reduce operating cost, greenhouse gas (GHG) emissions, and petroleum consumption in the transportation sector. However, the net effects of PHEVs depend critically on vehicle design, battery technology, and charging frequency. To examine these implications, we develop an optimization(More)
c We pose an MINLP model to minimize cost and GHG emissions of electrified vehicles. c We design PHEVs and BEVs and assign vehicles and charging infrastructure in US fleet. c Under US grid mix, PEVs provide minor GHG reductions and work chargers do little. c HEVs are robust; PEVs and work charging potential improve with a decarbonized grid. c We quantify(More)
This study estimates the life cycle water consumption and wastewater generation impacts of a Marcellus shale gas well from its construction to end of life. Direct water consumption at the well site was assessed by analysis of data from approximately 500 individual well completion reports collected in 2010 by the Pennsylvania Department of Conservation and(More)
We characterize regionally specific life cycle CO2 emissions per mile traveled for plug-in hybrid electric vehicles (PHEVs) and battery electric vehicles (BEVs) across the United States under alternative assumptions for regional electricity emission factors, regional boundaries, and charging schemes. We find that estimates based on marginal vs average grid(More)
Use of Case Study: This case study is intended to introduce modeling of product disposal fates to a general audience. Abstract The ultimate fate of products is an important issue in conducting environmental life cycle assessments, setting public policy on product disposal and tracing materials flows over time. This case study illustrates a methodology for(More)
Environmental management systems (EMSs) are growing in popularity as tools to manage corporate environmental issues. Despite widespread use, existing frameworks for EMSs may not provide organizations with the knowledge needed for decision-making. Through a synthesis of case studies and workshops, we suggest five elements for EMSs to be expanded for(More)