scholarly journals Identifying Cost Centers and Environmental Impacts Needs Assessment for Fracking Life Cycle in the United States

2016 ◽  
Vol 145 ◽  
pp. 444-451 ◽  
Author(s):  
Mohammed S. Hashem M. Mehany
Keyword(s):  
United States ◽  
Life Cycle ◽  
Needs Assessment ◽  
Environmental Impacts ◽  
The United States

Deciphering the true life cycle environmental impacts and costs of the mega-scale shale gas-to-olefins projects in the United States

2016 ◽  
Vol 9 (3) ◽  
pp. 820-840 ◽  
Author(s):  
Chang He ◽  
Fengqi You
Keyword(s):  
United States ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Shale Gas ◽  
The United States ◽  
Production Costs ◽  
Environmental Models ◽  
The U.S

Using detailed techno-economic-environmental models, we investigate the environmental impacts and production costs of the mega-scale shale gas-to-olefins projects in the U.S.

A Comparative Life-Cycle Assessment of Briquetting Logging Residues and Lumber Manufacturing Coproducts in Western United States

2018 ◽  
Vol 34 (1) ◽  
pp. 11-24 ◽  
Author(s):  
Sevda Alanya-Rosenbaum ◽  
Richard D. Bergman ◽  
Indroneil Ganguly ◽  
Francesca Pierobon
Keyword(s):  
United States ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Timber Harvest ◽  
The United States ◽  
Western United States ◽  
Forest Residues ◽  
Post Harvest ◽  
Forest Residue

Abstract. Timber harvest activities in the western United States have resulted in large volumes of low- to no-value logging (forest) residues. Alternatives to pile-and-burning are needed to best utilize this material and to mitigate the resultant environmental impacts. Briquetting (densifying) forest residues near-woods is one such option and is the focus of this study. This study presents a cradle-to-grave life-cycle assessment (LCA) performed to evaluate the overall environmental impacts associated with briquetting post-harvest forest residues and dry sawmill residues (sawdust) in the Pacific Northwest (PNW) region of the United States. Environmental impacts resulting from the two briquette production systems were compared with firewood and propane production, which are common residential heating sources in rural areas of the PNW, on a per 1 MJ of useful energy for domestic heating. In the briquetted post-harvest forest residue system, the feedstock preparation stage had the largest share in global warming (GW) impact, mainly resulting from the drying process (69.5%), followed by transportation. Valorization of post-harvest forest residues, in combination with a briquetter, to produce a bioenergy carrier was revealed to be advantageous in smog, acidification, and eutrophication impact categories, with considerable environmental benefits from avoided pile-and-burn emissions. With all scenarios investigated, briquette production from post-harvest forest residues with high dryer efficiency showed lowest GW impact compared to briquetting sawmill residues and firewood supply chain. For a scenario analysis, LCA showed that using a diesel generator to support the forest residue briquetter operation resulted in 45% higher GW impact compared to use of a wood-gas-powered generator. Keywords: Bioenergy, Biomass densification, Briquette, Forest residues, Life-cycle assessment, Sawdust.

scholarly journals Environmental Impacts of Surgical Procedures: Life Cycle Assessment of Hysterectomy in the United States

2015 ◽  
Vol 49 (3) ◽  
pp. 1779-1786 ◽  
Author(s):  
Cassandra L. Thiel ◽  
Matthew Eckelman ◽  
Richard Guido ◽  
Matthew Huddleston ◽  
Amy E. Landis ◽  
...  
Keyword(s):  
United States ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Surgical Procedures ◽  
The United States

Specters of Belonging

2018 ◽  
Author(s):  
Adrián Félix
Keyword(s):  
United States ◽  
Life Cycle ◽  
The United States ◽  
Political Life ◽  
The Political ◽  
Mexican Migrants ◽  
Mexican State ◽  
Mexico Border ◽  
Mexican Migrant ◽  
Transnational Citizenship

In the context of research on the “thickening” of borders, Specters of Belonging raises the related question: How does transnational citizenship thicken across the political life cycle of Mexican migrants? In addressing this question, this book resembles what any good migration corrido (ballad) does—narrate the thickening of transnational citizenship from beginning, middle, to end. Specifically, Specters of Belonging traces Mexican migrant transnationalism across the migrant political life cycle, beginning with the “political baptism” (i.e., naturalization in the United States) and ending with repatriation to México after death. In doing so, the book illustrates how Mexican migrants enunciate, enact, and embody transnational citizenship in constant dialectical contestation with the state and institutions of citizenship on both sides of the U.S.-México border. Drawing on political ethnographies of citizenship classrooms, the first chapter examines how Mexican migrants enunciate transnational citizenship as they navigate the naturalization process in the United States and grapple with the contradictions of U.S. citizenship and its script of singular political loyalty. The middle chapter deploys transnational ethnography to analyze how Mexican migrants enact transnational citizenship within the clientelistic orbit of the Mexican state, focusing on a group of returned migrant politicians and transnational activists. Last, the final chapter turns to how Mexican migrants embody transnational citizenship by tracing the cross-border practice of repatriating the bodies of deceased Mexican migrants from the United States to their communities of origin in rural México.

scholarly journals Detailed life cycle assessment of Bounty® paper towel operations in the United States

2016 ◽  
Vol 131 ◽  
pp. 509-522 ◽  
Author(s):  
Wesley Ingwersen ◽  
Maria Gausman ◽  
Annie Weisbrod ◽  
Debalina Sengupta ◽  
Seung-Jin Lee ◽  
...  
Keyword(s):  
United States ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
The United States ◽  
Paper Towel

scholarly journals Subnational mobility and consumption-based environmental accounting of US corn in animal protein and ethanol supply chains

2017 ◽  
Vol 114 (38) ◽  
pp. E7891-E7899 ◽  
Author(s):  
Timothy M. Smith ◽  
Andrew L. Goodkind ◽  
Taegon Kim ◽  
Rylie E. O. Pelton ◽  
Kyo Suh ◽  
...  
Keyword(s):  
United States ◽  
Supply Chain ◽  
Supply Chains ◽  
Environmental Impacts ◽  
Food System ◽  
The United States ◽  
Environmental Accounting ◽  
Animal Protein ◽  
Corn Production ◽  
Supply Networks

Corn production, and its associated inputs, is a relatively large source of greenhouse gas emissions and uses significant amounts of water and land, thus contributing to climate change, fossil fuel depletion, local air pollutants, and local water scarcity. As large consumers of this corn, corporations in the ethanol and animal protein industries are increasingly assessing and reporting sustainability impacts across their supply chains to identify, prioritize, and communicate sustainability risks and opportunities material to their operations. In doing so, many have discovered that the direct impacts of their owned operations are dwarfed by those upstream in the supply chain, requiring transparency and knowledge about environmental impacts along the supply chains. Life cycle assessments (LCAs) have been used to identify hotspots of environmental impacts at national levels, yet these provide little subnational information necessary for guiding firms’ specific supply networks. In this paper, our Food System Supply-Chain Sustainability (FoodS3) model connects spatial, firm-specific demand of corn purchasers with upstream corn production in the United States through a cost minimization transport model. This provides a means to link county-level corn production in the United States to firm-specific demand locations associated with downstream processing facilities. Our model substantially improves current LCA assessment efforts that are confined to broad national or state level impacts. In drilling down to subnational levels of environmental impacts that occur over heterogeneous areas and aggregating these landscape impacts by specific supply networks, targeted opportunities for improvements to the sustainability performance of supply chains are identified.

scholarly journals Intergenerational Mobility in the United States: What We Have Learned from the PSID

2018 ◽  
Vol 680 (1) ◽  
pp. 213-234 ◽  
Author(s):  
Bhashkar Mazumder
Keyword(s):  
United States ◽  
Socioeconomic Status ◽  
Life Cycle ◽  
Intergenerational Mobility ◽  
Panel Study ◽  
The United States ◽  
Group Differences ◽  
Income Dynamics ◽  
Mobility Studies ◽  
Advanced Economies

This article reviews the contributions of the Panel Study of Income Dynamics (PSID) to the study of intergenerational mobility. The PSID enables researchers to track individuals as they form new households and covers many dimensions of socioeconomic status over large portions of the life cycle, making the data ideal for studying intergenerational mobility. Studies have used PSID data to show that the United States is among the least economically mobile countries among advanced economies. The PSID has been instrumental to understanding various dimensions of intergenerational mobility, including occupation; wealth; education; consumption; health; and group differences by gender, race, and region. Studies using the PSID have also cast light on the mechanisms behind intergenerational persistence.

scholarly journals Life cycle air quality impacts on human health from potential switchgrass production in the United States

2018 ◽  
Vol 114 ◽  
pp. 73-82 ◽  
Author(s):  
Sumil K. Thakrar ◽  
Andrew L. Goodkind ◽  
Christopher W. Tessum ◽  
Julian D. Marshall ◽  
Jason D. Hill
Keyword(s):  
United States ◽  
Life Cycle ◽  
Air Quality ◽  
Human Health ◽  
The United States
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