Research & reports

Junyi Hua, H. Allen Klaiber, Douglas H. Wrenn · Journal of Environmental Quality · United States (Chesapeake Bay)

This study developed a micro-level Ricardian model to assess how long-run climate patterns affect agricultural land values across the urban-rural gradient in the Chesapeake Bay Watershed. Analysis using an 8-km gridded dataset combining farmland prices, high-resolution climate data, and urban land cover showed that seasonal temperature and precipitation nonlinearly affect land values, and urbanization significantly moderates precipitation effects. A climate simulation suggested heterogeneous impacts across urban grids.

Alex Kudryavtsev, Manuela Vega‐Zamora, Megan Nordgrén · The Journal of Environmental Education · United States (New York City)

This participatory, grounded case study examined New York Sun Works (NYSW), a nonprofit providing hydroponics labs and sustainability curricula to hundreds of public schools in New York City. Data from interviews with the executive director and nine teachers, and classroom observations, revealed a framework showing how school-nonprofit partnerships for sustainability education catalyze systemic impacts in educational transformation, sustainability solutions, and civil society. The findings suggest that nonprofit-facilitated, school-based sustainability education can advance significant educational, environmental, and societal transformations.

Douglas Donaghy · University of Chicago · United States (San Antonio)

This thesis explores the potential of transforming vacant lots and green spaces into multifunctional sites to address interconnected challenges of food insecurity, water scarcity, and urban heat in San Antonio, Texas. The study analyzes historical trends in aquifer water levels and infiltration metrics, spatial data on food deserts, and heat vulnerability indices across San Antonio to identify priority intervention areas. By integrating urban agriculture, bioretention basins, and vegetative cooling, these spaces can provide sustainable solutions to enhance food security, bolster the local water supply, and mitigate urban heat island effects.

Sara-Charlotte Cayen, Kesnamelie-Ann Outha, Pierre Paul Audate · International Journal of Environmental Health Research · North America

This narrative review synthesized the ecosystem services of urban food forests and their contributions to urban health and food sustainability in North American cities. Based on 13 studies published between 2018 and 2023, it identified that food forests provide services such as sustainable food production and climate regulation. However, their implementation faces challenges including public space governance, maintenance costs, regulatory barriers, and ecological risks like invasive species.

Ranjith P.C, Deekshith M, Murulidhar Venkannanavar, Geeta Gadekar · · Singapore; Brazil (Curitiba)

This chapter explores the contributions of green spaces, including parks, forests, and urban greenery, to key United Nations Sustainable Development Goals (SDGs) such as Good Health and Well-being (SDG 3) and Sustainable Cities and Communities (SDG 11). It highlights how nature access improves health, supports biodiversity, mitigates climate change, and strengthens urban infrastructure, while also promoting social inclusion and economic opportunities. Case studies from Singapore and Curitiba illustrate successful integration of nature into urban planning.

Qing Zhong, Daoqin Tong, Courtney Crosson, Yinan Zhang, Rashi Bhushan · Water Resources Research · United States

This study developed a spatial optimization model to identify investment strategies for deploying rainwater harvesting (RWH) and reclaimed water systems to expand urban food production in water-stressed cities. Applied to Tucson, Arizona, the model showed that 72%–96% of investment was allocated to rainwater tanks, though RWH contributed only 18%–27% of total food production. The results indicated that expanding the reclaimed water network was more effective and cost-efficient for urban food production compared to implementing rainwater tanks.

Rodrigo Calderón, Diana Garcia-Cejudo, Rob Roggema · Land · Mexico (Querétaro)

This study analyzes the paradox of food swamps, food availability, and food's ecological footprint in Querétaro, Mexico, to promote the creation of community gardens. Findings corroborate a soaring number of unhealthy food stores, elevated carbon footprints related to food production, and a community request for urban agriculture, including the regeneration of community public areas. The research proposes designing and implementing community gardens in two marginalized neighborhoods (Tlacote and San Antonio–Bolaños) in Querétaro.

Camila Urbina Lavajos, Oscar Vargas Chozo · Devenir - Revista de estudios sobre patrimonio edificado · Peru

A qualitative, descriptive study of the Tumino ravine in Moyobamba, Peru, examined the degradation of its evolving cultural landscape caused by inappropriate land use and informal settlement. Results showed 41% of the ravine area under conservation while another 41% faced unsustainable uses such as dumping and drainage discharge, with landscape fragmentation found to be affecting ecological connectivity and biodiversity. In response, the study proposes a system of ecological patches including urban gardens, green corridors, paths, boardwalks, viewpoints, wetlands and urban lagoons.

Yago Evangelista Tavares de Souza, Heloísa Soares de Moura Costa · Coleção Estudos Cariocas · Brazil

This article examines the evolution of urban-planning policy regarding nature and urban agriculture, from federal legislative texts to Rio de Janeiro's municipal master plans, analyzing documents including the 1976 draft Urban Development Law and the 1979 Federal Land Subdivision Law No. 6766. It traces decades of changes and revisions to show how legislation and public policy shaped the urban environment in relation to nature and agriculture, and it discusses the challenges small farmers face amid urbanization along with environmental approaches within the master plans.

Carolina Ceci Moino Alves Theodoro, Marcelo de Andrade Roméro · Caderno Pedagógico · Brazil

Drawing on an analysis of recent crises in Brazil—transportation strikes, floods, prolonged droughts, the pandemic, currency fluctuations, and international conflicts—that exposed fragilities in the food supply chain leading to food insecurity, food deserts, and shortage risk, this study proposes urban food self-sufficiency strategies using nationally and internationally recognized urban agriculture techniques. It examined hydroponic cultivation and vertical farms through technical site visits, literature review, and interviews with managers and nutritionists, defining the built and cultivable area needed to guarantee a minimum survival diet for an estimated population, and, given the relevance of energy consumption to final food cost, incorporated solar power installations sized to different demand levels to reduce grid dependence; the plan was conceived initially as an alternative system with potential to evolve into a redundant, mitigating system.

US Environmental Protection Agency (EPA) · US Environmental Protection Agency (EPA) · United States

An EPA summary of its 2024 survey of anaerobic digestion facilities processing food waste in the U.S., covering 313 identified facilities with 65 operating facilities responding (24% response rate). Excluding beverage-industry waste, processed tonnage rose from about 1.36 million tons in 2022 to about 1.43 million tons in 2023.

U.S. Environmental Protection Agency · US EPA Landfill Methane Outreach Program (LMOP) · United States

According to US EPA's LMOP page, landfill gas is roughly 50% methane and 50% CO2, and methane is at least 28 times more effective than CO2 at trapping heat over 100 years. Municipal solid waste landfills are the third-largest source of human-related methane emissions in the US, accounting for about 14.4%. There are 542 operational LFG energy projects nationwide, about 63% generating electricity and about 20% producing renewable natural gas.

Adriana de Paula Cavalcante Fraga, Ana Moraes Coelho, Jéssica Castro Chryssafidis, José Geraldo Barreto Monteiro de Andrade, Maíra Bombachini Silva, Maria Luiza Sevilha Seraphico de Assis Carvalho, Mariana Nicolletti, Nathan Debortoli, Samuel Santos de Souza Pinto · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil (Manaus)

A case study of urban and peri-urban agriculture in Manaus, Brazil, aimed to identify and characterize the benefits these agricultural initiatives provide to the territory. Using a hybrid methodology that combined biophysical modeling with listening to the voices of experienced protagonists, the study identified the significant potential of urban and peri-urban agriculture to contribute to city development. This research revealed the potential for urban agriculture to mitigate or solve typical urban problems.

Olivia M. Erskine, Alexa J. Lamm, Catherine E. Sanders, Kevan W. Lamm · Horticulturae · United States

This study investigated community garden coordinators' perceptions of the need for climate change adaptation, its attributes, and their position in the innovation-decision process in Georgia, North Carolina, and South Carolina, United States. Participants valued relative advantage and low complexity when adopting and implementing climate-smart practices. Community gardens were found to be implementing some form of climate-smart adaptations, even if not for climate-related reasons, but the largest barrier to adopting new practices was a lack of extra money.

Pierric Calenge, Maie Gérardot · Métropolitiques · United States (Cleveland)

The work by Max Rousseau and Vincent Béal illuminates the ambiguities of a policy that organizes urban decline and racial segregation in Cleveland. This policy promotes urban degrowth and racial segregation, balancing algorithmic management and urban greening. The study focuses on the Rust Belt region, which experiences de-urbanization marked by the subprime crisis, racism, and segregation.

Carolina Ceci Moino Alves Theodoro · Arte 21 · Brazil (São Paulo)

This study evaluated São Paulo's current food supply system and the impact of the COVID-19 pandemic on commercial property vacancies due to remote work. It presented national and international urban agriculture examples through bibliographic surveys. These examples can guide strategies for São Paulo to enhance food security and urban resilience, ensuring long-term supply during systemic stresses, natural disasters, and pandemics.

Marycruz Abato Zárate, Noel Reyes Pérez, Miguel Ángel Escalona Aguilar, Doris Guadalupe Castillo Rocha, Reyna Ruth Hernández Pérez · Revista Científica Estelí · Mexico

This qualitative study described a family's experience with urban agriculture and solid waste management in Emiliano Zapata, Veracruz, Mexico, through an open interview with a four-member family. The experience, spanning from 2001, included solid waste separation, composting, vermicomposting, rainwater harvesting (24 m3/year), and cultivating over 40 species of medicinal plants. The study found that urban gardens offer multidimensional benefits, including biodiversity protection, biocultural memory preservation, and spaces for learning and social participation.

Laura E. Balis, Emily Shaw, Whitney Fung Uy, Katie Nelson, Maryan Isack, Laura Flournoy, Daniele Vest, Jessie Deelo, Amy L. Yaroch · Agriculture & Food Security · United States

This scoping review examined the environmental and health impacts of locally distributed specialty crops in the Midwestern United States, analyzing 9 grey and 19 peer-reviewed sources. While specialty crops positively impacted nutritional intake for diverse populations, the effectiveness of production practices on soil and plant quality and greenhouse gas emissions was mixed. The review concluded that more rigorous study designs with long-term follow-up are needed.

Yevheniia Varyvoda, Taylor Ann Foerster, Joona Mikkola, Matthew M. Mars · Sustainability · United States (Arizona)

This multi-method study in Southern Arizona, USA, explored the adoption of nature-based solutions (NbS) by local food entrepreneurs (LFEs) for climate adaptation. The findings revealed that existing NbS were primarily introduced through learning-by-doing practices, which were constrained by economic and technological resource limitations. Priority adaptation pathways identified for NbS included funding, financing, and knowledge co-creation, with LFEs likely to adopt NbS based on their ability to address climate issues and generate revenue.

Adriana de Paula Cavalcante Fraga, Ana Moraes Coelho, José Geraldo Barreto Monteiro de Andrade, Jéssica Castro Chryssafidis, Maíra Bombachini Silva, Maria Luiza Sevilha Seraphico de Assis Carvalho, Mariana Nicolletti, Nathan Debortoli, Samuel Santos de Souza Pinto · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · Brazil

This study identified and analyzed the perceived benefits of urban and peri-urban agriculture (UPA) among participants in four Brazilian territories: Distrito Federal, Manaus/AM, Natal/RN, and Osasco/SP. Using a mixed methodological approach, the research revealed a wide diversity of benefits, including food production, climate change mitigation and adaptation, and health and well-being promotion. The findings highlight UPA's potential to address typical urban problems and suggest opportunities for integrating these benefits into public policies, requiring appropriate governance arrangements.

Olivia M. Erskine, Alexa J. Lamm, Kevan W. Lamm, Catherine E. Sanders · Journal of Applied Communications · United States

A study in the United States analyzed U.S. adults' motivations for engaging in community gardens and the perceived importance of climate-smart adaptations. Respondents primarily engaged in community gardens for health and social reasons and assigned some level of importance to climate-smart adaptations. Future research should explore the impact of rurality, food accessibility, and socioeconomic status on reasons for engagement and the associated importance of climate-smart adaptations.

M. Kühn, Geisa Zanini Rorato, Bruno César Euphrasio de Mello, Carolina Cristófoli Falcão, Rodrigo Vitória Alves · MIX Sustentável · Brazil

This article presents the results of a systematic literature review on Urban and Peri-urban Agriculture (UPA) in Brazil. The study indicated a quantitative increase in academic articles on UPA and a concentration of cited cases in cities in southern and southeastern Brazil. Qualitatively, the analysis revealed that UPA initiatives are primarily located intra-urban, often in common/public places, and operate within a community system, focusing on vegetable production for self-consumption.

Arnaldo Monteiro, Neusa Barbosa, Rosimeire Pereira, Josimar Cardoso · International Journal of Research in Agronomy · Brazil (São Paulo)

This 12-month study (March 2022-February 2023) at the University of São Paulo, Brazil, evaluated the productivity, water efficiency, and economic viability of a media-bed aquaponics system compared to conventional hydroponics and soil-based cultivation. Lettuce and basil were grown alongside Nile tilapia. Aquaponics used 78.2% less water than soil-based production and 22.1% less than hydroponics per kilogram of produce. Lettuce yields in aquaponics reached 4.83 kg/m², slightly below hydroponics (5.12 kg/m²) but well above soil cultivation (3.27 kg/m²), and the aquaponics unit achieved economic break-even at month 9 and returned a 14.3% annual profit margin.

Finn Bell · Critical and Radical Social Work · United States (Ypsilanti)

This qualitative study explored how marginalized agrarian traditions can aid communities in surviving climate change, conducting in-depth interviews with 23 marginalized food growers and community leaders in Ypsilanti, Michigan. The study found that while growing food builds resilience to food insecurity and climate change, it is difficult due to land injustice. Policy implications include the need for housing justice, proactive planning for climate refuges, and reparations for land rematriation.

Delf Rothe · Political Geography · United States (New York City)

This paper critically examines the concept of "green resilience" through a case study of various green resilience projects in New York City, including survivor trees, memorial groves, and community gardens. The study argues that these spaces function as key forms of state rule and biopolitical power, identifying three tensions or contradictions of green resilience as a form of biopolitical government: visibility and invisibility, knowledge and ignorance, and control and emergence.