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- All Subjects: Sustainability
- Creators: Arizona State University
Description
The modern food system unsustainably produces both a food surplus and record levels of hunger. Capitalist investment into agriculture disrupted natural cycles and social relations. Marx’s concept of the metabolic rift describes the way capitalist agriculture actively deteriorates the ecology (ecological rift) and disenfranchises people from food (social rift) are traced on the global scale. Then these rifts are deeply explored on the local scale of Maricopa County, Arizona to reveal the ways that even local food systems are enmeshed within the global capitalist agricultural food system. Phoenix, AZ, located in Maricopa County, has made commitments to become equitable and sustainable by 2050 in part to address issues facing the local food system. Efforts to achieve this goal (policies and studies) are analyzed using the frameworks of sustainable development (dominant “green”/ market based sustainability) and just sustainabilities (disruptive/ justice oriented sustainability). These frameworks help determine whether local efforts mend the ecological and social rifts created by capitalist agriculture, or actively deepen them. While a few studies may attempt “sustainable” solutions, they may in fact further entrench local agriculture in an unsustainable globalized food system. The efforts that are able to address both rifts, challenging the logic and structures of capitalist agriculture, are lacking in scale. In order for Phoenix to reach its sustainability goals by 2050, the ecological and social rifts must be addressed together. To do this, residents and policy makers must be able to determine between efforts that toy at the edges of capitalist agriculture and those with transformational potential, as they challenge the structures and logic of capitalism, ultimately mending the metabolic rift. While this is being done on a small scale, much more is needed to achieve a truly just and sustainable food system.
ContributorsLomelin, Marcelo Fabian (Author) / Perkins, Tracy (Thesis advisor) / Haglund, LaDawn (Committee member) / Adamson, Joni (Committee member) / Arizona State University (Publisher)
Created2022
Description
Since 2007-2008, Africa has become the center of estate-driven land acquisitions to produce feed, food, biofuels, and fiber for the international market, which has raised contested narratives of African development and critical sustainability challenges. This is the case for the “Sisal Belt” of Kilosa in Tanzania, where Chinese firms resurrected former colonial sisal estates and generated wage labor for adjacent farmers, changing local agrarian structures with significant implications for smallholder cultivation and the environment at large. Land system science aims to understand the land use and land cover dynamics as a coupled social-environmental system, focusing on the spatiotemporal patterns and the underlying socioeconomic and environmental drivers, impacts, and feedbacks of land system change. Following this interest, this dissertation uses three empirical studies to understand the processes of land system transformation in the sisal belt region and examine the consequences of the co-development by the estate and smallholder agriculture.
The first study conducts long-term time series land-cover mapping and remote sensing analysis via Google Earth Engine to detect land changes and their spatial and socio-economic linkages to estate operations and smallholder livelihoods. The second study applies agent-based modeling to assess the distinctions among smallholder households in land-use and livelihood decision-making mechanisms when confronting estate wage labor and cash crop opportunities. The third study quantifies and identifies critical tradeoffs between carbon, water services, and the outcomes of commodity economies based on distinct future scenarios of development visions and estate-smallholder relationships up to the year 2030.
The findings of these studies advance the understanding of the human-environmental conditions of estate and smallholders in Tanzania under the African land rush underway, which is consistent with the interest of land system and sustainability sciences. The policy implications drawn from this dissertation suggest that the primary land users and decision-makers should recognize the history and realities of the existing agrarian systems and engage in creative ways that serve the estate and the smallholder, including improving smallholder production and localizing estate operations. Such policies should be informed by assessments of changes in the environment and its services and be guided by local knowledge, needs, and future aspirations.
ContributorsLi, Puyang (Author) / Li, Wei (Thesis advisor) / Turner II, B.L. (Thesis advisor) / Monson, Jamie (Committee member) / Ligmann-Zielinska, Arika (Committee member) / Arizona State University (Publisher)
Created2022
Description
With less than seven years left to reach the ambitious targets of the United Nations' 2030 Sustainable Development Goals (SDGs), it is imperative to understand how the SDGs are operationalized in practice to support effective governance. One integrative approach, the water, energy, and food (WEF) nexus, has been proposed to facilitate SDGs planning and implementation by incorporating synergies, co-benefits, and trade-offs. In this dissertation, I conduct three interrelated WEF nexus studies using a sustainability lens to develop new approaches and identify actionable measures to support the SDGs. The first paper is a systematic literature review (2015 – 2022) to investigate the extent to which WEF nexus research has generated actionable knowledge to achieve the SDGs. The findings show that the WEF nexus literature explicitly considering the SDGs mainly focuses on governance and environmental protection, with fewer studies focusing on target populations and affordability. In the second paper, I reframed the water quality concerns using a nexus and systems thinking approach in a FEW nexus hotspot, the Rio Negro Basin (RNB) in Uruguay. While Uruguay is committed to the 2030 Agenda for Sustainable Development, sustainability challenges endure in managing synergies and trade-offs, resulting in strategy setbacks for the sustainable development of food, land, water, and oceans. Reframing the water quality problem facilitated the identification of potential alternative intervention points to support local problem-solving capacity. In the third paper, I conducted semi-structured interviews and examined the meeting transcripts of the RNB Commission to understand local perspectives about how the activities and initiatives taking place in the basin enhance or diminish the overall sustainability. Sustainability criteria for river basin planning and management were operationalized through qualitative appraisal questions. The case of the RNB illustrates the challenges of coordinating the national development agenda to local livelihood. This dissertation advances the WEF nexus and sustainability science literature by shedding light on the implications of the research trend to support the SDGs, as well as reframing and appraising a persistent water quality problem to support sustainable development.
ContributorsOjeda Matos, Glorynel (Author) / White, Dave D (Thesis advisor) / Brundiers, Katja (Committee member) / Garcia, Margaret (Committee member) / Arizona State University (Publisher)
Created2023
Description
Anglophone music festivals in the U.S. can be traced back to singing schools of the 1700s, which eventually blossomed into regular, outdoor musical performances, growing in popularity between 1840 and 1875. The first annual music festival in the United States was founded in Massachusetts in 1858. Modern single-destination music festivals grew in popularity in the United Kingdom and the United States during the late twentieth century. Although the Woodstock Music and Arts Fair of 1969 was not executed perfectly, it was an iconic event with a lasting cultural impact. Modern music festivals are modeled on the rural open-air festivals of the 1970s. In the past sixty years, the music industry has had to reconcile with the environmental impact of single-destination music festivals. Capitalistic ventures are inherently at odds with the environment—even music streaming has a significant carbon footprint. Corporate entities have been known to make insincere efforts to address their environmental impact, a tactic known as “greenwashing.” Music festivals hosting thousands of attendees generate a large amount of human waste on top of the already significant carbon emissions associated with travel, transport of equipment, and production. Event organizers must take significant measures to appeal to modern-day environmentally-conscious audiences. Burning Man and Bonnaroo are two events that once stood out among other large, corporate festivals for being developed by independent organizers. The two festivals are hosted on two strikingly different environments for which the organizers have made unique sustainability considerations. Burning Man celebrates radical individualism and self-reliance in a dry Nevada lakebed desert. On the other hand, Bonnaroo, hosted on the humid, rolling grassland of Tennessee is branded as an environmentally responsible event. The organizers of both festivals have promoted sustainability in their respective efforts to mitigate the environmental byproducts of their events, producing varying results. Sustainable festival practices have been utilized at Bonnaroo since its inception, whereas many of the longstanding traditions of Burning Man are antithetical to sustainability. This case study explores the rise of these two festivals, the environmentally conscious values held by both, and how they have changed over time.
ContributorsSheller, Nikhita (Author) / Norton, Kay (Thesis advisor) / Navarro, Fernanda (Committee member) / Little, Bliss (Committee member) / Arizona State University (Publisher)
Created2022
Description
This dissertation focuses on the endogenous conceptualization of development and sustainability emerging from settled non-native indigenous communities in the transborder region of Baja California, México. The study is comprised of interview data collected from a sample of 19 (n=19) self-identifying non-native indigenous community members and three key informants residing in various municipalities of the state. The purpose of this research is twofold, on the one hand, it aims to highlight the ways global north conceptualizations and praxis of development and sustainability in México have failed to include indigenous communities and fall short of creating feasible or appropriate practices of development and sustainability for marginalized communities. On the other, it focuses on the future perspectives of non-native indigenous communities to understand what development and sustainability look like for marginalized indigenous communities in México. The research finds that non-native indigenous communities’ settled in Baja California align more closely with the notion of Buen Vivir than development, in efforts to implement holistic approaches to progress and the conservation of their ethnic identity, culture and funds of knowledge. Additionally, the data reveals the bordering processes within ethnic and cultural scapes in Baja California’s society incentivizes merging funds of knowledge to achieve community recognition and progress. In essence, the experience and mobilization of settled non-native indigenous communities in Baja California break the perceived dichotomy between rural and urban, traditional and modern. The research also has some auxiliary findings: (1) indicating that in the state of Baja California the proliferation of development and sustainability discourses are polarized and relatively neglected in public discourses, despite its close transborder relationship with the US and growing concerns of development and sustainability in the northern nation. Second, indigenous women have been and continue to be important catalysts in community formation and representation.
ContributorsMora-Castillo, Brenda (Author) / Cruz-Torres, Maria l (Thesis advisor) / Wutich, Amber (Committee member) / Manuel-Navarrete, David (Committee member) / Arizona State University (Publisher)
Created2022
Description
Transitioning towards low-carbon energy systems requires participation from a diversity of organizations, governments, and actors. Yet it is still unclear who, when, how much, and what types of participation are needed to realize such transformations. I address this gap by analyzing the role of participation in energy transitions using interviews, participant observation, document analyses, and novel visualization approaches deployed in the USA and Mexican contexts. I offer a framework to explore how engagement in energy transitions unfolds over time and deploy the framework to 1) investigate the role of engagement in decreasing the consumption of gas and electricity at municipal and residential levels in 12 US communities during a three-year competition (2014-2017) organized by Georgetown University; and 2) assess the acceptance and longevity of solar projects that grant electricity access to rural and dispersed Indigenous Ralámuli communities in Chihuahua, México. I found that wider and deeper participation does not always secure lower energy consumption in the US case, which highlights the need to tailor participation for specific goals. Results from Ralámuli communities suggest that the benefits of participation reach a limit; that is, when high participation surpassed the budget (in the form of cash/money and time availability) of solar users, participation became detrimental to user satisfaction and technology acceptance. Lastly, the analysis of how participation occurred in solar home systems with longer longevity (more than five years of use) showed that maintenance and operation costs (e.g. battery replacements) are the greatest barriers to longevity, while knowledge and capacity building might be elements driving longer longevity. Recommendations include: (1) offering clear information in the user’s first language about the costs and maintenance of solar systems, (2) seeking ideas from solar users at the early stages of solar programs, and (3) reducing costs through understanding electricity needs and offering collective forms of ownership. My work expands the theoretical understanding of the role of participation in energy transitions and offers practical resources for practitioners and researchers to facilitate a critical reflection on how participation influences desirable outcomes in different contexts, including communities in the global North and South.
ContributorsMorales Guerrero, Jorge (Author) / Karwat, Darshan (Thesis advisor) / Breetz, Hanna (Committee member) / Larson, Kelli (Committee member) / Berbés-Blázquez, Marta (Committee member) / Arizona State University (Publisher)
Created2022
Description
Both molecular structure of macromolecular materials and subsequent processing of these materials dictate resulting material properties. In this work novel synthetic strategies combined with detailed analytical methodology reveal fundamental structure-processing-property relationships in thermoplastic polyesters, thermoplastic polyurethanes, covalently crosslinked acetal functionalized networks, and small molecule surfactants. 4,4’ dimethyloxybisbenzoate afforded a series of novel polyester structures, and the incorporation of this monomer both increased the Tg and decreased the crystallinity in cyclohexane dimethanol based polyesters. Solubility and dynamic light scattering experiments combined with oscillatory rheology techniques provided methodology to validate polyurethane extrusion in commercial polyurethanes. Acid catalyzed hydroxyl addition to vinyl ethers provided two families of acetal functionalized poly(ethylene glycol hydrogels). Stoichiometric control of binary thiol-acrylate polymerizations afforded hydrogels with both tunable mechanical properties and predictable degradation profiles. Following this work, a photoacid generator catalyzed cationic catalysis provided acetal functionalized organogels whose mechanical properties were predicted by excess vinyl ether monomers which underwent cationic polymerization under the same reaction conditions that yielded acetal functionalization. Time resolved FT-IR spectroscopy provided new understanding in hydroxyl vinyl ether reactions, where both hydroxyl addition to a vinyl ether and vinyl ether cationic polymerization occur concurrently. This work inspired research into new reactive systems for photobase generator applications. However, current photobase generator technologies proved incompatible for carbon-Michael reactions between acetoacetate and acrylate functionalities as a result of uncontrollable acrylate free radical polymerization. The fundamental knowledge and synthetic strategies afforded by these investigations were applied to small molecule surfactant systems for fire-fighting applications. Triethylsilyl-containing zwitterionic and cationic surfactants displayed surface tensions lower than hydrocarbon surfactants, but larger than siloxane-containing surfactants. For the first time, oscillatory rheology and polarized optical light imagine rheology highlighted shear-induced micelle alignment in triethylsilyl surfactants, which provided more stable foams than zwitterionic analogues. The knowledge gained from these investigations provided fundamental structure-processing-property relationships in small molecule surfactant solutions applied as fire-fighting foams. This discovery regarding the effect of self-assembled structures in foam solutions informs the design and analysis of next generation surfactants to replace fluorocarbon surfactants in fire-fighting foam applications.
ContributorsBrown, James Robert (Author) / Long, Timothy E (Thesis advisor) / Bortner, Michael J (Committee member) / Biegasiewicz, Kyle F (Committee member) / Jin, Kailong (Committee member) / Arizona State University (Publisher)
Created2023
Description
Acrylate polymers are a versatile class of polymers that have found extensive applications in diverse fields, including adhesive, coatings, packaging, cosmetics, textile, food, electronics, and automotive industries. Incorporating crosslinking elements such as supramolecular chemistry or photoreactive group imparts unique and desirable properties to the resulting acrylate polymers. In the first project, regioselective Michael addition allowed the efficient installation of the nucleobase, guanine and cytosine, on acrylate-containing monomers, which enabled the preparation of a series of nucleobase functionalized acrylate and n-butyl acrylate copolymers using conventional free radical copolymerization. Guanine-containing copolymers exhibited superior thermal, thermomechanical, and morphological properties than cytosine-containing copolymer analogs due to the relatively strong guanine self-association. Further understanding of rheological, mechanical, and adhesive properties revealed the influence of guanine content and provided valuable information for designing and optimizing guanine-containing copolymers for elastomers and adhesives. Controlled radical polymerization enabled the synthesis of guanine and cytosine-containing triblock copolymers. Blending these two triblock copolymers formed supramolecular networks through molecular recognitions between guanine and cytosine and enhanced polymer self-assembly. Next, incorporating spiropyran photoisomerization functional groups in the acrylate copolymer enabled the formation of zwitterionic polymers upon ultraviolet (UV) radiation, which facilitated the Cu ion removal from aqueous solutions. The final project aimed to synthesize a family of macro-crosslinkers bearing an acrylate pendant group, which demonstrated compatibility with versatile reactive diluents, such as poly(dimethyl siloxane) and epoxy. The designed macro-crosslinkers showed promise in developing UV adhesives with desirable properties, such as low shrinkage, fast curing, and high thermal stability. These projects offered valuable insights into the fundamental structure-property-morphology relationships in crosslinked acrylic polymers that incorporate supramolecular chemistry or photoreactive functional groups, paving the way for new advances in the design of acrylate polymer with enhanced mechanical and morphological properties.
ContributorsLiu, Boer (Author) / Long, Timothy TEL (Thesis advisor) / Moore, Robert RBM (Committee member) / Jin, Kailong KJ (Committee member) / Biegasiewicz, Kyle KFB (Committee member) / Arizona State University (Publisher)
Created2023
Description
After many decades of promoting sustainable tourism and development, the world faces the pressing issue of overtourism. Overtourism is viewed as the condition where the growth of visitor volume puts destinations’ capacity under pressure resulting in many negative impacts on the environment, economy, culture, and society. It causes many community residents to resent tourism development. Visitors are concerned about their travel experience in overcrowded places. Understanding overtourism is necessary for destination management. This dissertation includes three studies to: 1) review the phenomenon of overtourism; 2) examine the perceptions of local residents and test the relationship between their satisfaction with quality of life and level of support for tourism development in overtourism context; and 3) examine the management of stakeholder involvement in an evidence-based sustainable tourism plan that aims to address overtourism. Different research methods are employed in the three studies of the dissertation: a conceptual paper based on literature review; a concurrent triangulation approach using both quantitative and qualitative data collected from a survey with host community; and a case study involving analysis of documents related to a sustainable tourism plan and in-depth interviews with key informants who were involved in developing the plan. Several theoretical or conceptual frameworks are used to guide research, including those that consider the relationship between residents’ satisfaction with QOL and their support for tourism development, crowding theory, stress coping framework, place attachment, and a multi-stakeholder involvement management framework. Sedona, a destination that is concerned about overtourism, was chosen to be the research site for two of the studies. Study 1 reveals the complexity of overtourism and pinpoints important aspects and details (e.g., causes, impacts) that need to be considered while solving overtourism. Study 2 investigates impacts of overtourism on the quality of life of the host community and identifies different ways residents cope with the crowding condition. Residents’ support for tourism development is influenced by their satisfaction with quality of life and possibly by their attachment to destination. Study 3 documents a comprehensive mechanism to manage stakeholder involvement and utilization of evidence in a sustainable tourism plan. Findings are helpful for destination management.
ContributorsPham, Kim (Author) / Andereck, Kathleen (Thesis advisor) / Vogt, Christine (Thesis advisor) / Nyaupane, Gyan (Committee member) / Morgan, Mark (Committee member) / Arizona State University (Publisher)
Created2023
Description
The purpose of this study was to comprehend the global warming potential (GWP), cost variability, and competitiveness of steel with rising carbon taxes. Aluminum, glass fiber composite, and carbon fiber composite were chosen as competing materials. In order to compare the aforementioned factors, the GWP of several processes to produce steel, aluminum, and fiber composites was examined. Cost analyses of various methods were also carried out to determine their viability. Energy consumption data for each of the paths under consideration were taken from the literature for the study. To get the consistent GWP for traditional and decarbonized scenarios, the required energy is multiplied with corresponding energy source (natural gas or electricity). Even after accounting for the carbon tax and the weight-reduction factor, the results show that steel still has the lowest production costs, followed by aluminum, while fiber composites remain the most costly. EAF- steel and secondary aluminum has least GWP followed by H2-DRI (Hydrogen- Direct Reduced Iron)steel and NG-DRI (Natural Gas- Direct Reduced Iron) steel with carbon capture and storage (CCS). The state of art technology for glass fiber reinforced composite also emits less carbon dioxide but the cost of production is still high. Carbon fiber reinforced composite emits most carbon dioxide and is least economical.
ContributorsRajulwar, Vaishnavi Vijay (Author) / Seetharaman, Sridhar (Thesis advisor) / Emady, Heather (Committee member) / Nian, Qiong (Committee member) / Arizona State University (Publisher)
Created2023