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Articles 3451 - 3480 of 8702
Full-Text Articles in Physical Sciences and Mathematics
Envisioning Higher Education For Sustainability After The Sh*T Hits The Fan, Paul Morgan, Rebecca Drake
Envisioning Higher Education For Sustainability After The Sh*T Hits The Fan, Paul Morgan, Rebecca Drake
Sustainability Research & Practice Seminar Presentations
No abstract provided.
Arctic Ice And The Ecological Ascent Of The Dinosaurs, Paul E. Olsen
Arctic Ice And The Ecological Ascent Of The Dinosaurs, Paul E. Olsen
Sustainability Seminar Series
Despite the extremely high levels of atmospheric CO2 (+2000 ppm) in the Late Triassic and earliest Jurassic (~232-199 million years ago), there is evidence of seasonally freezing conditions in the Arctic of that time. This evidence consists of abundant icerafted debris in lake sediments. Based on phylogenetic bracket analysis, dinosaurs at this time were insulated, and could take advantage of the rich Arctic deciduous and evergreen vegetation, even under freezing winter conditions. Transient volcanic winters caused by the eruptions of the Central Atlantic Magmatic Province led to a mass extinction at 201.6 million years ago, at the close of the …
Ua12/2/1 College Heights Herald, Vol. 95, No. 18, Wku Student Affairs
Ua12/2/1 College Heights Herald, Vol. 95, No. 18, Wku Student Affairs
WKU Administration Documents
WKU campus newspaper reporting campus, athletic and Bowling Green, Kentucky news. This issue contains articles:
- Lamb, Cassady. Posted Up: Local Apartment Complexes Are Suing the United States Post Office
- Williams, Matthew. WKU to be Evaluated by Higher Education Consulting Firm
- Collins, Michael. Strategic Sustainability Plan to be Developed
- Stack, Madalyn. Editorial Cartoon re: Racism
- Black History Month: Past & Present
- Warner, Casey. Kentucky Canabis Laws Are Behind the Times – Marijuana
- Dobbs, Jack. Bitter Sweet – Chocolate Festival, Hospice of Southern Kentucky
- Metcalf, Taylor. Fast Fashion
- Lowe, Julianna. Sustainable On-campus Bathroom Practices, In Public or Private
- Gaylord, Kaden. WKU Softball …
Project 1851 - A Journey In Sustainability: A Tech-Integrated And Regenerative Rental Property, Markos Duey
Project 1851 - A Journey In Sustainability: A Tech-Integrated And Regenerative Rental Property, Markos Duey
Sustainability Research & Practice Seminar Presentations
No abstract provided.
Reconstructing Last Interglacial Sea Level To Understand How Ice Sheets Behave In A Warmer World, Jacqueline Austermann
Reconstructing Last Interglacial Sea Level To Understand How Ice Sheets Behave In A Warmer World, Jacqueline Austermann
Sustainability Seminar Series
The last interglacial (125 ka) marks a time during which global mean temperatures were 1-2º warmer than pre-industrial values. This time period has therefore been used as a natural laboratory for studying ice sheet stability and sea level rise in a warmer world. Local sea level during the last interglacial can be reconstructed using sea level indicators such as fossil corals. In order to infer global mean sea level, or equivalent ice volume, one needs to correct local sea level estimates for post-depositional deformation. In this presentation I will explain what solid Earth deformation needs to be accounted for in …
Risk And Cost Assessment Of Nitrate Contamination In Domestic Wells, Pongpun Juntakut, Erin M.K. Haacker, Daniel D. Snow, Chittaranjan Ray
Risk And Cost Assessment Of Nitrate Contamination In Domestic Wells, Pongpun Juntakut, Erin M.K. Haacker, Daniel D. Snow, Chittaranjan Ray
Daugherty Water for Food Global Institute: Faculty Publications
This study combines empirical predictive and economics models to estimate the cost of remediation for domestic wells exceeding suggested treatment thresholds for nitrates. A multiple logistic regression model predicted the probability of well contamination by nitrate, and a life cycle costing methodology was used to estimate costs of nitrate contamination in groundwater in two areas of Nebraska. In south-central Nebraska, 37% of wells were estimated to be at risk of exceeding a threshold of 7.5 mg/L as N, and 17% were at risk of exceeding 10 mg/L as N, the legal limit for human consumption in the United States. In …
Ecological Risk Assessment Of The Shark Bay Invertebrate Fisheries, Department Of Primary Industries And Regional Development
Ecological Risk Assessment Of The Shark Bay Invertebrate Fisheries, Department Of Primary Industries And Regional Development
WA Marine Stewardship Council report series
The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.
Noncooperative Dynamics In Election Interference, David Rushing Dewhurst, Christopher M. Danforth, Peter Sheridan Dodds
Noncooperative Dynamics In Election Interference, David Rushing Dewhurst, Christopher M. Danforth, Peter Sheridan Dodds
College of Engineering and Mathematical Sciences Faculty Publications
Foreign power interference in domestic elections is an existential threat to societies. Manifested through myriad methods from war to words, such interference is a timely example of strategic interaction between economic and political agents. We model this interaction between rational game players as a continuous-time differential game, constructing an analytical model of this competition with a variety of payoff structures. All-or-nothing attitudes by only one player regarding the outcome of the game lead to an arms race in which both countries spend increasing amounts on interference and counterinterference operations. We then confront our model with data pertaining to the Russian …
Upcycling Phosphorus Recovered From Anaerobically Digested Dairy Manure To Support Production Of Vegetables And Flowers, Katherine K. Porterfield, Robert Joblin, Deborah A. Neher, Michael Curtis, Steve Dvorak, Donna M. Rizzo, Joshua W. Faulkner, Eric D. Roy
Upcycling Phosphorus Recovered From Anaerobically Digested Dairy Manure To Support Production Of Vegetables And Flowers, Katherine K. Porterfield, Robert Joblin, Deborah A. Neher, Michael Curtis, Steve Dvorak, Donna M. Rizzo, Joshua W. Faulkner, Eric D. Roy
College of Engineering and Mathematical Sciences Faculty Publications
Dissolved air flotation (DAF) separates phosphorus (P)-rich fine solids from anaerobically digested dairy manure, creating opportunities to export surplus P to the marketplace as a bagged plant food product. Seedlings of tomato and marigold were amended at various volume per volume (v/v) ratios with plant foods consisting of fine solids upcycled (i.e., transformed into a higher quality product) by drying and blending with other organic residuals. A plate competition assay was conducted to assess the fine solids' potential to suppress the plant pathogen Rhizoctonia solani. Plant foods were comprised of 2.0-2.1% N, 0.8-0.9% P and 0.6-0.8% K. Extractions indicated that …
Upcycling Phosphorus Recovered From Anaerobically Digested Dairy Manure To Support Production Of Vegetables And Flowers, Katherine K. Porterfield, Robert Joblin, Deborah A. Neher, Michael Curtis, Steve Dvorak, Donna M. Rizzo, Joshua W. Faulkner, Eric D. Roy
Upcycling Phosphorus Recovered From Anaerobically Digested Dairy Manure To Support Production Of Vegetables And Flowers, Katherine K. Porterfield, Robert Joblin, Deborah A. Neher, Michael Curtis, Steve Dvorak, Donna M. Rizzo, Joshua W. Faulkner, Eric D. Roy
Rubenstein School of Environment and Natural Resources Faculty Publications
Dissolved air flotation (DAF) separates phosphorus (P)-rich fine solids from anaerobically digested dairy manure, creating opportunities to export surplus P to the marketplace as a bagged plant food product. Seedlings of tomato and marigold were amended at various volume per volume (v/v) ratios with plant foods consisting of fine solids upcycled (i.e., transformed into a higher quality product) by drying and blending with other organic residuals. A plate competition assay was conducted to assess the fine solids' potential to suppress the plant pathogen Rhizoctonia solani. Plant foods were comprised of 2.0-2.1% N, 0.8-0.9% P and 0.6-0.8% K. Extractions indicated that …
Ecological Risk Assessment Of The Exmouth Gulf Prawn Managed Fishery, Department Of Primary Industries And Regional Development
Ecological Risk Assessment Of The Exmouth Gulf Prawn Managed Fishery, Department Of Primary Industries And Regional Development
WA Marine Stewardship Council report series
The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.
Ecological Risk Assessment Of The Abrolhos Islands And Mid-West Trawl Managed Fishery, Department Of Primary Industries And Regional Development
Ecological Risk Assessment Of The Abrolhos Islands And Mid-West Trawl Managed Fishery, Department Of Primary Industries And Regional Development
WA Marine Stewardship Council report series
The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.
Planning For The Peel Food Zone, Heather M. Percy
Planning For The Peel Food Zone, Heather M. Percy
All other publications
The Planning for the Peel Food Zone project is part of Phase 1 of the Transform Peel initiative.Transform Peel is intended to be a ‘disruptive’ long-term program that supports economic growth, diversification and creates jobs in the Peel region. Transform Peel recognises the importance of protecting the internationally recognised waterways and wetlands of the Peel–Harvey Estuary and aims to halve the nutrient loads entering its waterways from the surrounding catchment.
The $49.3 million Phase 1 program for Transform Peel comprises three main components: Peel Food Zone; Peel Integrated Water Initiative; Peel Business Park.
This report summarises the findings from the …
Reverse Osmosis; Addressing Freshwater Shortage With Sustainable Desalination, Jessica Savage
Reverse Osmosis; Addressing Freshwater Shortage With Sustainable Desalination, Jessica Savage
Sustainability Conference
Water security is an imperative part of high-functioning societies. Currently, large populations of the globe live in water-impoverished or water-stressed areas. With climate change and growing global populations, projections show more people being impacted by issues of water shortage.
One solution to water security is the implementation of desalination, specifically with reverse osmosis systems. This presentation walks through the history, capabilities, future work, and explanations on how reverse osmosis systems work. With continued research on improving desalination, communities in both developed and developing nations around the world can work towards total water security.
Recovering From Industrial Overshoot: Thermal Removal Of Atmospheric Co2, Ted Von Hippel, Sandra Boetcher, Matthew Traum, Farshid Azadian Ph.D., William Mackunis
Recovering From Industrial Overshoot: Thermal Removal Of Atmospheric Co2, Ted Von Hippel, Sandra Boetcher, Matthew Traum, Farshid Azadian Ph.D., William Mackunis
Sustainability Conference
Humanity will soon overshoot a safe level of atmospheric CO2, if it hasn't done so already. Countries, industries, and the global economy need to dramatically and quickly alter their behavior and technology to avoid this dangerous overshoot, yet this appears unlikely. Direct Air Capture of CO2 represents an insurance policy for society - a way of removing excess atmospheric CO2. I will present an approach to this problem based on thermal physics that cools cubic kilometers of air to extract CO2 as it sublimates. I propose a combination of an efficient heat exchanger, radiative cooling, and refrigeration, all at industrial …
Using Low-Cost Renewable Energy For Waste Valorization, Zhiyong Jason Ren
Using Low-Cost Renewable Energy For Waste Valorization, Zhiyong Jason Ren
Sustainability Seminar Series
With renewable electricity costing 2 cents per kwh to even negative in some places during some periods, how to use cheap renewable energy to maximize waste valorization can become an interesting direction. In this talk, I will discuss some recent progress in identifying the synergy between microbial electrochemistry and photoelectrochemistry that led to the development of new materials and systems for spontaneous high rate H2 production from wastewater and sunlight. I will also report some development on functional hydrophobic gas transfer membrane electrodes that enabled specific resource recoveries from wastewater and CO2. While we have been focusing on energy-neutral wastewater …
Perspectives Of Global Warming, Diomaris Padilla Dr.
Perspectives Of Global Warming, Diomaris Padilla Dr.
Open Educational Resources
This course is designed to foster an interest in global environmental issues by informing the student of both the anthropogenic and natural causes for climate change. While focusing on the scientific aspects of climate change, a broader study will include issues pertaining to global policy and economics in order to engage the student in public policy debates.
Sdstate Sustainability Newsletter: Vol. 4 Issue 1, Jennifer Mclaughlin
Sdstate Sustainability Newsletter: Vol. 4 Issue 1, Jennifer Mclaughlin
SD State Sustainability Newsletter
Food Pod Ties Environmental and Social Sustainability
Harding Hall Wins Award for Reuse
Recycling Factors
Sustainability Tidbits
Majority Of Rural Residents Compost Food Waste: Policy And Waste Management Implications For Rural Regions, Meredith T. Niles
Majority Of Rural Residents Compost Food Waste: Policy And Waste Management Implications For Rural Regions, Meredith T. Niles
College of Agriculture and Life Sciences Faculty Publications
A growing number of municipalities and states are implementing household food waste diversion efforts such as curbside compost programs, though these programs present challenges for participation and implementation. While many food waste diversion programs are occurring in densely populated regions, understanding food waste management in rural regions is less studied. This research examines the food waste perceptions and current and future food waste management behaviors of residents in Vermont, one of the most rural U.S. states, through a representative telephone survey of Vermont residents (n = 583) in 2018. The findings suggest 55% of residents support banning food waste from …
Statistical Analysis Of Nutrient Loads From The Mississippi-Atchafalaya River Basin (Marb) To The Gulf Of Mexico, Phyllis Okwan, Yi Zhen, Huan Feng, Shinjae Yoo, Murty S. Kambhampati, Abreione Walker, Shayne Boykin, Joe Omojola, Noel Blackburn
Statistical Analysis Of Nutrient Loads From The Mississippi-Atchafalaya River Basin (Marb) To The Gulf Of Mexico, Phyllis Okwan, Yi Zhen, Huan Feng, Shinjae Yoo, Murty S. Kambhampati, Abreione Walker, Shayne Boykin, Joe Omojola, Noel Blackburn
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works
This study investigated the annual and seasonal variations in nutrient loads (NO2− + NO3− and orthophosphate) delivered to the Gulf of Mexico from the Mississippi-Atchafalaya River Basin (MARB) and examined the water quality variations. The results indicate that (1) annually, the mean NO2− + NO3− and orthophosphate loads showed a steady increase during 1996–1999, a persistent level during 2000–2007, and a moderate increase during 2008–2016; (2) seasonally, NO2− + NO3− and orthophosphate in MARB in spring and summer were higher than those in autumn and winter. Analysis of …
Agricultural Development Addresses Food Loss And Waste While Reducing Greenhouse Gas Emissions, Gillian L. Galford, Olivia Peña, Amanda K. Sullivan, Julie Nash, Noel Gurwick, Gillian Pirolli, Meryl Richards, Julianna White, Eva Wollenberg
Agricultural Development Addresses Food Loss And Waste While Reducing Greenhouse Gas Emissions, Gillian L. Galford, Olivia Peña, Amanda K. Sullivan, Julie Nash, Noel Gurwick, Gillian Pirolli, Meryl Richards, Julianna White, Eva Wollenberg
Rubenstein School of Environment and Natural Resources Faculty Publications
Food loss and waste (FLW) reduce food available for consumption and increase the environmental burden of production. Reducing FLW increases agricultural and value-chain productivity and may reduce greenhouse gas emissions associated with feeding the global population. Although studies of interventions that reduce FLW exist, almost no research systematically investigates FLW interventions across multiple value chains or countries, most likely due to challenges in collecting and synthesizing data and estimates, let alone estimating greenhouse gas emissions. Our research team investigated changes in FLW in projects supported by the United States Agency for International Development's (USAID) global hunger and food security initiative, …
Arjen Y. Hoekstra 1967–2019, Davy Vanham, Mesfin Mekonnen, Ashok K. Chapagain
Arjen Y. Hoekstra 1967–2019, Davy Vanham, Mesfin Mekonnen, Ashok K. Chapagain
Daugherty Water for Food Global Institute: Faculty Publications
Arjen Hoekstra introduced the water footprint in 20021, building on the concept of virtual water Tony Allan to discuss the role of trade in alleviating water scarcity in the Middle East. He thereby opened a new dimension in the debate around fair and sustainable allocation of freshwater resources. He laid the foundations to show the role of indirect water (that is, water used elsewhere to produce goods we consume) in our daily life beyond our direct use for drinking, cooking or washing. The water footprint is an indicator of direct and indirect water use by a producer or consumer, showing …
Swine Slurry Characteristics As Affected By Selected Additives And Disinfectants, Jon Duerschner, Shannon L. Bartelt-Hunt, Kent Eskridge, John E. Gilley, Xu Li, Amy M. Schmidt, Daniel D. Snow
Swine Slurry Characteristics As Affected By Selected Additives And Disinfectants, Jon Duerschner, Shannon L. Bartelt-Hunt, Kent Eskridge, John E. Gilley, Xu Li, Amy M. Schmidt, Daniel D. Snow
Nebraska Water Center: Faculty Publications
Current swine industry practice is to house animals in confinement facilities which capture and store feces and urine as slurry in pits below the production area. Additives and disinfectants may be introduced into the manure pits. This study was conducted to measure the effects of additives and disinfectants on temporal changes in swine slurry characteristics. Slurry from a commercial swine production facility in southeast Nebraska, USA was collected and transferred to 57 L reactors located within a greenhouse. Selected additives and disinfectants were added to the reactors and physical properties, chemical characteristics, and antibiotic concentrations were monitored for 40 days. …
Applied Injected Air Into Subsurface Drip Irrigation: Plant Uptake Of Pharmaceuticals And Soil Microbial Communities, Matteo D'Alessio, Lisa M. Durso, Clinton Williams, Christopher A. Olson, Chittaranjan Ray, Ellen Paparozzi
Applied Injected Air Into Subsurface Drip Irrigation: Plant Uptake Of Pharmaceuticals And Soil Microbial Communities, Matteo D'Alessio, Lisa M. Durso, Clinton Williams, Christopher A. Olson, Chittaranjan Ray, Ellen Paparozzi
Nebraska Water Center: Faculty Publications
The growing global food security crisis is complicated by the need for increased crop production with less arable land and limited water resources. Reuse of treated wastewater for agricultural irrigation is becoming more common, often paired with other conservation measures such as subsurface drip irrigation (SDI). Passively injecting air into SDI systems increases crop yields and overcomes root zone wetting issues. However, when used with treated irrigation water, contaminants in the water might be taken up by the crops. This paper investigates the impact of air-injected water containing caffeine, carbamazepine, and gemfibrozil on plant uptake and soil microbial communities in …
Are Wolves Welcome? Hunters' Attitudes Towards Wolves In Vermont, Usa, Nelson Grima, John Brainard, Brendan Fisher
Are Wolves Welcome? Hunters' Attitudes Towards Wolves In Vermont, Usa, Nelson Grima, John Brainard, Brendan Fisher
Rubenstein School of Environment and Natural Resources Faculty Publications
Published by Cambridge University Press on behalf of Fauna & Flora International. The forests of the north-east USA were once home to the Wolf Canis lupus, a species that played an important role in the ecology of this region. However, wolves were eradicated from the region more than a century ago, altering the species composition of the landscape and driving cascading changes in this ecosystem. Outdoor recreation is a major component of the economy of this region, and outdoor recreationists, including the hunting community, have a strong influence over decision-making related to policies on natural resources. Given their powerful position, …
Stars Annual Report, 2020, Campus Sustainability Office
Stars Annual Report, 2020, Campus Sustainability Office
Campus Sustainability Office Publications, Reports and Presentations
The Campus Sustainability Office (CSO) compiles information from departments across campus annually to complete the STARS Report. The score is based on the number of points received across five categories: Academics, Engagement, Operations, and Planning & Administration, and Innovation & Leadership. PSU has maintained a Gold rating since the institution began reporting in 2011 and is within the top 40 of over 400 reporting institutions. This summary includes improvement opportunities to assist our efforts to eventually become a STARS Platinum institution. For more information on improvement opportunities please contact Amanda Wolf at wolf@pdx.edu
Utility Summary Fiscal Year 2020, Campus Sustainability Office
Utility Summary Fiscal Year 2020, Campus Sustainability Office
Campus Sustainability Office Publications, Reports and Presentations
Energy usage listed by building.
Fragmentation And Inefficiencies In Us Equity Markets: Evidence From The Dow 30, Brian F. Tivnan, David Rushing Dewhurst, Colin M. Van Oort, John H. Ring, Tyler J. Gray, Brendan F. Tivnan, Matthew T.K. Koehler, Matthew T. Mcmahon, David M. Slater, Jason G. Veneman, Christopher M. Danforth
Fragmentation And Inefficiencies In Us Equity Markets: Evidence From The Dow 30, Brian F. Tivnan, David Rushing Dewhurst, Colin M. Van Oort, John H. Ring, Tyler J. Gray, Brendan F. Tivnan, Matthew T.K. Koehler, Matthew T. Mcmahon, David M. Slater, Jason G. Veneman, Christopher M. Danforth
College of Engineering and Mathematical Sciences Faculty Publications
Using the most comprehensive source of commercially available data on the US National Market System, we analyze all quotes and trades associated with Dow 30 stocks in calendar year 2016 from the vantage point of a single and fixed frame of reference. We find that inefficiencies created in part by the fragmentation of the equity marketplace are relatively common and persist for longer than what physical constraints may suggest. Information feeds reported different prices for the same equity more than 120 million times, with almost 64 million dislocation segments featuring meaningfully longer duration and higher magnitude. During this period, roughly …
How To Measure, Report And Verify Soil Carbon Change To Realize The Potential Of Soil Carbon Sequestration For Atmospheric Greenhouse Gas Removal, Pete Smith, Jean Francois Soussana, Denis Angers, Louis Schipper, Claire Chenu, Daniel P. Rasse, Niels H. Batjes, Fenny Van Egmond, Stephen Mcneill, Matthias Kuhnert, Cristina Arias-Navarro, Jorgen E. Olesen, Ngonidzashe Chirinda, Dario Fornara, Eva Wollenberg, Jorge Álvaro-Fuentes, Alberto Sanz-Cobena, Katja Klumpp
How To Measure, Report And Verify Soil Carbon Change To Realize The Potential Of Soil Carbon Sequestration For Atmospheric Greenhouse Gas Removal, Pete Smith, Jean Francois Soussana, Denis Angers, Louis Schipper, Claire Chenu, Daniel P. Rasse, Niels H. Batjes, Fenny Van Egmond, Stephen Mcneill, Matthias Kuhnert, Cristina Arias-Navarro, Jorgen E. Olesen, Ngonidzashe Chirinda, Dario Fornara, Eva Wollenberg, Jorge Álvaro-Fuentes, Alberto Sanz-Cobena, Katja Klumpp
Rubenstein School of Environment and Natural Resources Faculty Publications
Global Change Biology published by John Wiley & Sons Ltd There is growing international interest in better managing soils to increase soil organic carbon (SOC) content to contribute to climate change mitigation, to enhance resilience to climate change and to underpin food security, through initiatives such as international ‘4p1000’ initiative and the FAO's Global assessment of SOC sequestration potential (GSOCseq) programme. Since SOC content of soils cannot be easily measured, a key barrier to implementing programmes to increase SOC at large scale, is the need for credible and reliable measurement/monitoring, reporting and verification (MRV) platforms, both for national reporting and …
Looking Into The Dragons Of Cultural Ecosystem Services, Rachelle K. Gould, Alison Adams, Luis Vivanco
Looking Into The Dragons Of Cultural Ecosystem Services, Rachelle K. Gould, Alison Adams, Luis Vivanco
Rubenstein School of Environment and Natural Resources Faculty Publications
Cultural ecosystem services research is in a somewhat tumultuous state. The cultural ecosystem services (CES) idea is seen simultaneously as a welcoming, expansive addition to conservation policy-making and as a strange, square-peg-in-a-round-hole concept that should be replaced by a more appropriate metaphor or conceptual structure. This confluence of interest and skepticism suggests an opportune moment to take stock of CES, both as a concept and growing scholarly field. Here, we focus on dilemmas that characterize and constitute CES as a field of empirical inquiry and practice. We describe five tensions that characterize the field (and mirror tensions in interdisciplinary work …