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- All Subjects: Sustainability
- Creators: Arizona State University
- Member of: Theses and Dissertations
Description
Globally, land use change is the primary driver of biodiversity loss (IPBES, 2019). Land use change due to agricultural expansion is driving bird species to the brink of extinction in the Peruvian Amazon rainforest. Agriculture is one of the primary threats to bird species in the region, and agroforestry is being pursued in some communities as a potential solution to reduce agriculture's impacts on species, as agroforestry provides improved habitat for wildlife while also enabling livelihoods for people. Understanding how anthropogenic land use choices affect imperiled species is an important prerequisite for conservation policy and practice in the region. In this thesis, I develop a spatial model for quantifying expected threat abatement from shifting agricultural land use choices towards agroforestry. I used this model explored how agricultural land use impacts imperiled bird species in the Peruvian Amazon. My approach builds on the species threat abatement and restoration (STAR) metric to make the expected consequences of reducing agricultural threats spatially explicit. I then analyzed results of applying the metric to alternative scenarios with and without agroforestry conversion. I found that agroforestry could result in up to 18.68% reduction in mean bird projected population decline. I found that converting all terrestrial agriculture in the Peruvian Amazon to agroforestry could produce a benefit of up to 83% to imperiled birds in the region in terms of improvement in Red List status. This use of the STAR metric to model alternative scenarios presents a novel usage for the STAR metric and a promising approach to understand how to address terrestrial biodiversity challenges efficiently and effectively.
ContributorsPoe, Katherine (Author) / Iacona, Gwen (Thesis advisor) / Gerber, Leah (Thesis advisor) / Mair, Louise (Committee member) / Arizona State University (Publisher)
Created2023
Description
Development is a compelling, but imprecise goal. Although the concept can motivate action and mobilize resources, fundamental questions about what it means to ‘develop’ and what actions are required to achieve that goal remain the subject of intense debate. Faced with this uncertainty, development actors can look to two sources of guidance: other disciplines, or the practice of development itself. This dissertation explores the origins of the theories which guide development action and argues that in order for development to deliver on its mandate it must reject supposedly universal theories borrowed from other disciplines (‘exogenous’ theories) and instead must develop contingent, local theories based in the on-the-ground experiences of those doing development (‘endogenous’ theories).
This argument is demonstrated using the case of innovation theory in Guyana. Innovation and development are both popular ways to make sense of change and in recent decades they have become conflated, with innovation being presented as a near-universal fix for development problems. This discourse has taken root in Guyana, where the recent discovery of oil has made the questions of development increasingly urgent and the promise of innovation increasingly attractive. The argument proceeds in four phases:
Chapter one explores how and why certain theories become influential in development, then discusses the implications of doing development work based on ‘exogenous’ versus ‘endogenous’ theory. It then proposes four guidelines for the use of theory in development.
Chapter two traces how innovation came to become understood as a solution to development problems, and assesses whether and under what conditions it can be expected to contribute to development.
Chapter three turns to Guyana, and builds on interviews and participant observation to present an endogenous theory of innovation in Guyana. The chapter also explores the practical and methodological challenges of building such a theory.
Chapter four compares the endogenous theory of innovation presented in the previous chapter to several dominant exogenous theories, exploring the policy implications of each and demonstrating why the endogenous theory provides a superior source of guidance for development action in Guyana.
ContributorsBarton, Chris J (Author) / Crow, Michael (Thesis advisor) / Anderson, Derrick (Thesis advisor) / Grossman, Gary (Committee member) / Chhetri, Nalini (Committee member) / Calhoun, Craig (Committee member) / Arizona State University (Publisher)
Created2023
Description
This study deals with various flow field designs for anode, cathode, and coolant plates for optimizing the performance of proton exchange membrane fuel cell using H2 and air. In particular, the 3D models with various flow field patterns such as single parallel serpentine (anode), multi parallel (anode), multi-parallel serpentine (cathode), multi serpentine (cathode) have been evaluated for enhancing the fuel cell performance at 60 oC, with three different coolant flow designs (mirror serpentine, multi serpentine and parallel serpentine). Both the peak power and limiting current density are considered based on the parameters such as temperature distribution, pressure distribution, reactants/species distribution and the membrane water content on the active area (50 cm2) region. It is interesting to note that the coolant channel also has a significant effect in regulating the fuel cell performance at high current densities, in addition to reactant gas flow channels. The simulated single cell with Nafion (thickness: 18 m) demonstrates a peak power density of 0.97 W.cm-2 with single parallel serpentine (anode), multi parallel serpentine (cathode) and serpentine (coolant) and 0.91 W.cm-2 with multi parallel (anode), multi serpentine (cathode), and parallel serpentine (coolant) flow field designs. The simulated fuel cell performance is also experimentally validated with four cells at 60 oC using H2 fuel and air as the oxidant.
ContributorsAhmed, Rafiq (Author) / Mada Kannan, Arunachala (Thesis advisor) / Torres, Cesar (Committee member) / Lin, Jerry (Committee member) / Arizona State University (Publisher)
Created2023
Description
The management of underground utilities is a complex and challenging task due to the uncertainty regarding the location of existing infrastructure. The lack of accurate information often leads to excavation-related damages, which pose a threat to public safety. In recent years, advanced underground utilities management systems have been developed to improve the safety and efficiency of excavation work. This dissertation aims to explore the potential applications of blockchain technology in the management of underground utilities and reduction of excavation-related damage. The literature review provides an overview of the current systems for managing underground infrastructure, including Underground Infrastructure Management (UIM) and 811, and highlights the benefits of advanced underground utilities management systems in enhancing safety and efficiency on construction sites. The review also examines the limitations and challenges of the existing systems and identifies the opportunities for integrating blockchain technology to improve their performance. The proposed application involves the creation of a shared database of information about the location and condition of pipes, cables, and other underground infrastructure, which can be updated in real time by authorized users such as utility companies and government agencies. The use of blockchain technology can provide an additional layer of security and transparency to the system, ensuring the reliability and accuracy of the information. Contractors and excavation companies can access this information before commencing work, reducing the risk of accidental damage to underground utilities.
ContributorsAlnahari, Mohammed S (Author) / Ariaratnam, Samuel T (Thesis advisor) / El Asmar, Mounir (Committee member) / Czerniawski, Thomas (Committee member) / Arizona State University (Publisher)
Created2023
Description
Communications around sustainability have been found to be incongruent with eliciting the transformative change required to address global climate change and its' repercussions. Recent research has been exploring storytelling in sustainability, specifically with an emphasis on reflexive and emancipatory methods. These methods encourage embracing and contextualizing complexity and intend to target entire cognitive hierarchies. This study explores the possibility of using emancipatory and reflexive storytelling as a tool to change attitudes pertaining to the Valley Metro Light Rail, an example of a complex sustainability mitigation effort. I explore this in four steps: 1) Conducted a pre-survey to gauge preexisting attitudes and predispositions; 2) Provided a narrative that uses storytelling methodologies of reflexivity and emancipation through a story about the light rail; 3) Conducted a post-survey to gauge attitude shift resulting from the narrative intervention; 4) Facilitated a focus group discussion to examine impact qualitatively. These steps intended to provide an answer to the question: How does emancipatory and reflexive storytelling impact affective, cognitive and conative attitudes regarding local alternative transportation? By using tripartite attitude model, qualitative and quantitative analysis this paper determines that reflexive and emancipatory storytelling impacts attitudinal structures. The impact is marginal in the survey response, though the shift indicated a narrowing of participant responses towards one another, indicative of participants subscribing to emancipation and reflexivity of their held attitudes. From the group discussion, it was evident from qualitative responses that participants engaged in emancipating themselves from their held attitudes and reflected upon them. In doing so they engaged in collaboration to make suggestions and suggest actions to help those with experiences that differed from their own. Though this research doesn’t provide conclusive evidence, it opens the door for future research to assess these methodologies as a tool to elicit shared values, beliefs and norms, which are necessary for collective action leading to transformative change in response to global climate change.
ContributorsSwanson, Jake Ryan (Author) / Roseland, Mark (Thesis advisor) / Larson, Kelli (Committee member) / Calhoun, Craig (Committee member) / Schoon, Michael (Committee member) / Arizona State University (Publisher)
Created2023
Description
Massive gaps exist within and across climate efforts, which are often siloed, inequitable, and ineffective within and across local, national, and global community contexts. Climate justice was defined in this study as the need for activism and advocacy to address the disproportionate crises, impacts, and intersectional needs that communities experience due to climate crises. The intent of the “Climate Justice Collaborative Toolkit” and co-development process that I developed and examined in this dissertation was to improve intersectional collaboration, capacity building, and reciprocal agreements that would ensure better mitigation and adaptation of climate crisis events. The purpose of this study was to answer this research question: What are community participants' perceptions of this toolkit and collaborative co-development process for purposes of climate and racial justice? The purpose of this study was also to assess the impacts of the toolkit and accompanying process among members involved in climate justice and action groups, and develop case study stories to help revise and finalize the toolkit and surrounding co-development process for inclusive purposes. I asked these questions via a mixed-methods action research study, in which participants completed a pre-survey instrument, engaged in group orientations and toolkit meetings, participated in group leader interviews, and completed a post-survey instrument. Mixed-methods data suggested the near-unanimous need for greater participation, as well as representation, in climate efforts in order to create more equitable and racial justice outcomes. Additional findings involved to what extent collective groups, organizations, and other entities might better focus on the significant impacts of gender inequality within climate change crises. Another finding evidenced was that the toolkit was also used by participants as a decision-making system that helped enhance participants’ communication efforts and subsequent identifications of climate and racial justice issues, as well as potential solutions. Future iterations from these findings will include more detailed toolkit versions to effectively promote collaboration as linked to case studies presented as stories in the toolkit. This supports that a diverse range of community members’ lived experiences and intersectional issues considered in any climate effort can lead to more equitable, intersectional, and systems changing processes and outcomes.
ContributorsPeel, Michael (Author) / Amrein-Beardsley, Audrey (Thesis advisor) / Morris, Vernon (Committee member) / Kinslow II, Anthony (Committee member) / Arizona State University (Publisher)
Created2023
Description
Rising inequality is a defining challenge in the 21st century and although the 2030 agenda for sustainable development is far from perfect, its commitment to tackling inequalities is praiseworthy. To this end, a deeper understanding of how social inequality affects sustainable development can help us rethink development policies and practices. Social inequality is multidimensional and in the last two decades, there has been an upsurge of research in this area. However, these research do not provide a comprehensive understanding of the nature and extent of inequality and its impact on the United Nations Sustainable Development Goals. In particular, they ignore important dimensions such as wealth and the environment in their analysis. In this dissertation, the discourse on how inequality has evolved is first explored and the analysis reveals that the inequality discourse has shifted from its early focus on the measurement of conditions, defined as the unequal distribution of income and/or material goods, towards a more comprehensive approach of measuring inequality of opportunities. Second, the dissertation examines the short run and long run relationship between social inequality and sustainable development. This is achieved by relying on panel data for 142 countries using the Coefficient of Human Inequality and the Sustainable Development Goals Index and the findings reveal that social inequality and sustainable development share a negative relationship which appears to be robust to the inclusion of controls and the country’s level of development. Finally, this dissertation examines the inequality situation in Guyana by relying on a survey of 403 households and in doing so it computes a measure of social inequality using the Atkinson index along with the dimensions of income, education, health, wealth and the environment. The dissertation finds that Guyana is experiencing a high level of social inequality and it is hindering the country’s progress on the sustainable development goals.
ContributorsArmstrong, Sydney (Author) / Chhetri, Netra NC (Thesis advisor) / Hernandez-Cortes, Danae DHC (Committee member) / Chhetri, Nalini NC (Committee member) / Arizona State University (Publisher)
Created2023
Description
The cost of capturing carbon dioxide (CO2) from ambient air needs to be greatly reduced if it is to contribute significantly to mitigating climate change. Ion-exchange resin (IER) with quaternary ammonium cation binds CO2 when dry and releases it when wet without supplemental energy, making the process attractive for economical Direct Air Capture (DAC). In this study, a design case basis was developed for a system of collectors capable of capturing 1000 tons/day of CO2 via moisture swing sorption. The model uses varying weather parameters such as temperature, wind speed, and relative humidity to understand the impact of weather on the sorbent loading, cycle time (capture and regeneration), and net water loss. Two independent isotherm models, namely Flory Huggins and the modified Langmuir isotherm model were used to estimate the water and CO2 loading of the resin respectively as a function of relative humidity. The capture model suggests a higher capture rate during the summer and daytime (in a diurnal cycle) as the relative humidity is lower. A design optimization model was developed to minimize the capture time and maximize the sorbent loading. The crude rate production and the net water loss can help conduct an economic analysis to determine the cost of carbon capture.
ContributorsTalha, Mohammad Abu (Author) / Green, Matthew (Thesis advisor) / Lackner, Klaus (Committee member) / Cirucci, John (Committee member) / Arizona State University (Publisher)
Created2023
Description
University-level sustainability education in Western academia attempts to focus on eliminating future harm to people and the planet. However, Western academia as an institution upholds systems of oppression and reproduces settler colonialism. This reproduction is antithetical to sustainability goals as it continues patterns of Indigenous erasure and extractive relationships to the Land that perpetuate violence towards people and the planet. Sustainability programs, however, offer several frameworks, including resilience, that facilitate critical interrogations of social-ecological systems. In this thesis, I apply the notion of resilience to the perpetuation of settler colonialism within university-level sustainability education. Specifically, I ask: How is settler colonialism resilient in university-level sustainability education? How are, or could, sustainability programs in Western academic settings address settler colonialism? Through a series of conversational interviews with faculty and leadership from Arizona State University School of Sustainability, I analyzed how university-level sustainability education is both challenging and shaped by settler colonialism. These interviews focused on faculty perspectives on the topic and related issues; the interviews were analyzed using thematic coding in NVivo software. The results of this project highlight that many faculty members are already concerned with and focused on challenging settler colonialism, but that settler colonialism remains resilient in this system due to feedback loops at the personal level and reinforcing mechanisms at the institutional level. This research analyzes these feedback loops and reinforcing mechanisms, among others, and supports the call for anti-colonial and decolonial reconstruction of curriculum, as well as a focus on relationship building, shifting of mindset, and school-wide education on topics of white supremacy, settler colonialism, and systems of oppression in general.
ContributorsBills, Haven (Author) / Klinsky, Sonja (Thesis advisor) / Goebel, Janna (Committee member) / Schoon, Michael (Committee member) / Arizona State University (Publisher)
Created2022
Description
Demand for specialty coffee worldwide is increasing, yet producers primarily located in developing countries struggle to cover their production costs and sustain their livelihood. Coffee producers are globally seeking higher profits by adapting their conventional production practices to be more socially and environmentally responsible. This dissertation aims to analyze the U.S. import demand for coffee and investigate consumer preferences and willingness to pay for coffee labels representing sustainability efforts. Chapter one introduces the coffee industry and the three chapters of this research. In the second chapter, I analyze the influence of consumers' values and the warm glow effect of giving on their willingness to pay for sustainable coffee using a non-hypothetical auction mechanism. I use an information treatment to test the effect of information on consumers' willingness to pay. Providing information increases the premium consumers are willing to pay for sustainable coffee. Regarding values, consumers that like coffee and experience the warm glow of giving are willing to pay a premium for coffee with a sustainability label. Using a hypothetical online choice experiment, in the third chapter, I investigate coffee consumers' preferences and willingness to pay for Fair Trade, Direct Trade, Rainforest Alliance and USDA Organic coffee. I find that consumers value sustainability labels that aim to solve social issues more than those whose primary goal is to solve environmental problems. I find that when two labels are together on a coffee bag, there is no effect on consumers’ utility. However, there is a positive effect on consumers' willingness to pay for coffee labeled simultaneously for Fair Trade and Organic, and simultaneously for Direct Trade and Organic. In the fourth chapter, I estimate coffee price elasticities between major coffee exporters to the U.S. and calculate pass-through import cost using a system-wide differential demand system. I compare imports of arabica and robusta green coffee and estimate the degree to which they complement each other or substitute one another. I find that arabica and robusta from Brazil, Colombia, and Mexico are substitutes but some exceptions show a complementary relationship. The inclusion of the exchange rate into the demand system has a significant effect on U.S. coffee demand. I find an incomplete pass-through cost of the exchange rate to U.S. import prices.
Chapter six concludes by summarizing the results of this dissertation and discussing the future challenges for the coffee industry.
ContributorsFuller, Katherine (Author) / Grebitus, Carola (Thesis advisor) / Schmitz, Troy (Committee member) / Hughner, Renee (Committee member) / Arizona State University (Publisher)
Created2022