Research & reports

Luiz Guilherme Luz Cardoso, Solange Teles da Silva · Revista Brasileira de Direito Urbanístico | RBDU · Brazil

This study investigated how Urban and Peri-urban Agriculture (AUP) can address climate inequalities as an extension of the fundamental right to a sustainable city, given Brazil's accelerated urbanization and worsening heat islands in peripheral areas. Using a hypothetical-deductive method and documentary and content analysis of institutional, journalistic, and academic data from 2000 to 2026, the study analyzed AUP practices' contribution to mitigating thermal and socioeconomic asymmetries. Results indicate that AUP restores land use value, fills normative gaps in master plans, and establishes itself as a vector for democratic governance, food sovereignty, and intergenerational urban sustainability.

Jaqueline Lopes Pereira, Bárbara Lellis de Sá Frizo, Denise Miguel Teixeira Roberto, Gabriela Rigote, Clara Ribeiro Camargo, Fabrício Muriana, Gabriela Mariano Mendonça, Maurício Alcântara, Roberta Moraes Curan, Dirce Maria Lobo Marchioni, Aline Martins de Carvalho · Revista de Saúde Pública · Brazil (Belém)

This study analyzed the sustainability of the food system in the Belém Metropolitan Region, Brazil, focusing on public institutional purchasing policies in 2022. Municipalities allocated 31 million reais to the National School Feeding Program, with 43.5% from family farming, exceeding the legal target. The Food Acquisition Program saw the Abril Vermelho settlement sell 28 tons of food, prioritizing permanent crops and agro-ecological practices.

Carlos Luiz Vieira · · Brazil

This study analyzes protected cultivation and hydroponics in Brazil as technologies enabling full control of environmental variables and eliminating dependence on climate seasonality. These technologies demonstrate 80-95% reductions in water consumption, 300-500% increases in productivity compared to open fields, and complete elimination of agrochemical residues. However, the study also points out implementation challenges for these technologies, concluding they are fundamental for food security in contexts of accelerated urbanization, water scarcity, and global climate change.

Héctor Bernal-Mendoza, Daniel Jiménez-García, Natyeli Matus Angulo, Miguel Ángel Escalona Aguilar · Agroecología · Mexico (Puebla)

This study evaluated the sustainability of 18 urban gardens in Puebla, Mexico, from 2020 to 2021. The MESMI methodology was applied using 14 indicators across economic, environmental, and social dimensions. Two alternative systems were identified: transitional to conventional and transitional to agroecological, with the latter showing the highest values in 7 indicators and thus concluded to be the most sustainable.

Marwen Elkamel, Luis Rabelo · Sustainability · United States (South Florida)

This paper presents a mathematical programming model to optimize the design and sustainability performance of the urban food–energy–water (FEW) nexus. The model incorporates a micro supply chain and addresses the supply-demand balance within existing and future FEW systems using cost and carbon footprint indicators. It is applied to an urban agriculture network in South Florida, integrating renewable energy technologies, combined heat and power units, reclaimed wastewater and stormwater, and electric vehicles. The optimization process identified effective infrastructure investment, resource allocation, and technology configurations to support circular economy and sustainability.

Tiare Silvasy · Proceedings of the Florida State Horticultural Society · United States (Florida)

An educational campaign was conducted in Florida to teach people how to grow food in an environmentally friendly way, specifically tailored for edible crops. The campaign covered topics such as efficient irrigation, planting the right variety at the right time, advanced soil building techniques, and integrated pest management strategies. Science-based information was made available online through multiple formats, including EDIS publications, an infographic, blogs, PowerPoint presentations, and YouTube webinar recordings. This campaign reached thousands of people and provided information to encourage environmentally friendly decisions in edible landscapes.

Jéssica de Oliveira, Micael Silva de Freitas, Frederico Augusto Guimarães Guilherme, Jonathan Souza Oliveira, Laura Beatriz Oliveira, E. V. E. J. Amaral, Eder Marcos da Silva, Wendy Carniello Ferreira, Anderson Ribeiro Diniz, Carlos Rogério Andrade, Deivid Lopes Machado · Urban Ecosystems · Brazil (Jataí)

The temporal dynamics of urban greening in public squares in Jataí, Goiás state, Brazil, were evaluated through two surveys in 2010 and 2024. A complete floristic census of 14 public squares found no difference in total abundance but a significant increase in species richness from 79 to 121. However, urban greening management prioritized exotic and deciduous species, detrimentally affecting ecosystem attributes essential for sustainable planning, such as permanent shading and the valuation of regional flora.

Carlos Alberto Garza Alonso, María de Jesús Ordóñez Díaz, Flor Esthela Sánchez Cortés, José Carmen García Flores · Journal of Ethnobiology · Mexico

This study analyzed the multifunctionality of 40 community gardens in the Monterrey Metropolitan Area, Nuevo León, México, using literature review, participant observation, interviews, questionnaires, and systematic tours. It recorded 80 species, predominantly used for food and medicine, and found that people possess significant traditional ecological knowledge applied in garden management. The study concluded that community gardens positively contribute to sustainability, food production, self-consumption, and social fabric.

R P Mula, Molly Doane, Gabrielle Powell, Myer G. Mula · Asian Journal of Agricultural Extension Economics & Sociology · United States (Chicago)

This study visited, documented, and described 15 community gardens in Chicago, Illinois, and interviewed their leaders. It found the utmost importance of saving traditional crop seeds (heirlooms) for diversity, climate change mitigation, and health, as these are grown organically. Insights include reorienting mindsets, crafting garden requirement manuals, consolidating the value chain, and educating health workers on promoting community gardening.

Alejandra Acevedo-De-los-Ríos, Anna Dyson, Damien Claeys, Úrsula Cárdenas‐Mamani · Ecological Modelling · Peru (Lima)

This study developed a four-stage diagnostic-to-simulation framework to integrate urban agriculture (UA) and socio-ecological resilience in informal settlements, calibrated for Ciudad de Gosen, Lima, Peru (6300 inhabitants). Simulation results indicate that rooftop and unbuilt-land cultivation can meet household vegetable and fruit demand, biodigestion can supply 17–52% of energy needs, and greywater reuse can sustain approximately 77% of irrigation. Governance reforms and land tenure security were identified as primary accelerators for UA adoption and improved food security.

Henrique Freitas Ferreira Reis, Ana Lorena Demarques Moura, Maria Rita Scotti Muzzi, Eleonora Sad de Assis · RCMOS - Revista Científica Multidisciplinar O Saber · Brazil (Belo Horizonte)

This work analyzed the relationship between urban densification and microclimatic impacts, focusing on the Confisco neighborhood in Belo Horizonte, Brazil, which is susceptible to heatwaves, landslides, and food insecurity by 2030. A systematic literature review of 33 sources evaluated the feasibility of implementing green roofs as a nature-based solution to mitigate climate extremes and promote food security through urban gardens. Results indicate green infrastructure reduces surface temperatures by up to 10.46°C and retains up to 90% of stormwater runoff, while socially strengthening psychosocial resilience and food sovereignty among low-income families.

Natalie Meyer, Simona Trandafir · Journal of Environmental Economics and Policy · United States (Rhode Island)

A choice-based survey of over 600 US residents from Rhode Island examined preferences and perceived value for green rooftop (GR) space allocations for agriculture, solar energy, and recreation. Latent class modeling revealed that Class 1, representing 20% of respondents, was generally unsupportive of GR installation and expressed disutility towards GR space allocation for solar energy. Both classes uniformly favored allocating GR space for agriculture production and showed a positive willingness to pay for this feature.

Evelyn Seilhe Guerreiro, Márcio Luis Valença Araújo, Adilson Oliveira de Almirante, Eduardo Oliveira Teles, Aloísio Santos Nascimento Filho, Hugo Saba Pereira Cardoso · Journal of Bioengineering, Technologies and Health · Brazil

This study analyzed the integration of Controlled Environment Agriculture (CEA), community gardens, and public health policies, using case studies from Brazilian cities such as Salvador, Recife, São Paulo, and Rio de Janeiro. CEA contributes to enhanced productivity in small spaces with reduced water and input consumption, while community gardens strengthen social cohesion, mental health, and local food supply. However, challenges remain regarding high implementation costs, regulatory gaps, and lack of institutional support.

Maria de Nazareth Oliveira Maciel, Daniel Pereira Pinheiro, Luann Yago Oliveira Maciel · Veredas do Direito Direito Ambiental e Desenvolvimento Sustentável · Brazil

This study analyzed the contributions and challenges of urban agriculture for food security in three municipalities of the Belém Metropolitan Region, Brazil. Using multivariate factor analysis with 120 producers from November 2023 to February 2024, findings indicated urban agriculture ensures food security and reduces food scarcity concerns. However, the activity lacks public policy incentives for seed acquisition and land titling, hindering its advancement.

Charlotte Potter, Silvia Sarapura, Camilo Jimenez Gonzalez, Justina Walker-Mohamed, Paul Benalcazer, Biinjitiwaabik Zaagging Anishinaabek, Netmizaaggamig Nishnabeg, Red Rock Indian Band · Rural Review Ontario Rural Planning Development and Policy · Canada (Northern Ontario)

The 'Braiding Food Systems' project, a community-led partnership with three Northern Ontario First Nations, used mixed-methods Participatory Action Research to examine conditions influencing food security and sovereignty. Community members identified structural constraints rooted in colonial governance, contemporary ecological pressures, and local transformation opportunities. This research demonstrates that sustained, community-led collaboration can counterbalance colonial food systems by reorganizing decisions, strengthening access, and enhancing resilience within Indigenous food networks.

Elías Machado · Editora Científica Digital eBooks · Brazil (Guarapuava)

This study examines the relationship between climate change, urbanization, and urban and peri-urban agriculture in Guarapuava-PR, Brazil. It emphasizes how regional atmospheric variability intensifies existing socio-environmental vulnerabilities. Guarapuava's climate, characterized by high thermal amplitude, frequent frosts, and irregular rainfall, significantly conditions agricultural production systems, especially in urban and peri-urban areas, negatively affecting productive cycles.

Ada Folques, Mario R. Paredes, Vanessa Apaolaza, Patrick Hartmann · Business Strategy and the Environment · United States

This study examined demand-side drivers of consumers' willingness to pay for food forest produce in the United States, using a quota-based online panel sample of 845 adults. It focused on nature connectedness, perceived health risks from monoculture farming, climate change concern, and need for uniqueness. All four factors positively influenced willingness to pay, with nature connectedness being the most influential. The impact of climate change concern on willingness to pay was stronger among consumers with low uniqueness-seeking and weaker among those with high uniqueness-seeking.

AltTech LLC & Subsidiaries, The People's Coalition of Planet Earth · Zenodo (CERN European Organization for Nuclear Research) · United States

This paper presents Project Ubuntu's "Big Green Web," a proposed nationwide U.S. framework of interconnected, renewable-energy-powered community-governed food forests intended to provide free, open-access food production for communities of color, drawing on principles of food sovereignty, environmental justice and mutual aid; the paper examines the framework's theoretical foundations and operational structure as a proposed model rather than reporting outcomes from an implemented program.

Candice M. Duncan, Fatemeh Ghezelsofla, Hlengilizwe Nyoni, Jazmin Escobar, Odette Mina · Toxics · United States

A study measuring per- and polyfluoroalkyl substances (PFAS) in irrigation water at two organic farms in Maryland, USA, with no known direct PFAS input, and assessing health risk via a Hazard Index (HI). At agricultural site 1 (AG1), the most abundant compounds were PFBS (37 ng/L), PFBA (24 ng/L) and PFHxA (22 ng/L); the HI showed compliance for branched PFHxS (0.39) but non-compliance for linear PFHxS (1.51). At agricultural site 2 (AG2), despite no known industrial or PFAS-related facilities nearby, HFPO-DA (GenX) was detected at 28 ng/L, and the HI exceeded the compliance threshold (HI = 2.83), with GenX accounting for most of the calculated risk. The findings show HI exceedances occurring at small farm sites with no identifiable contamination source.

Marcelo Budal Cabral, Alysson Maia Fontenele · Revista JurisFIB · Brazil

This legal article examines the significance of urban agriculture for greening cities and for greenhouse gas mitigation and climate adaptation in Brazil. Using bibliographic and documentary research with a hermeneutic approach, it analyzes precedents including the Inter-American Court of Human Rights' Advisory Opinion 32/2025 (climate emergency) and the Brazilian Federal Supreme Court's Arguição de Descumprimento de Preceito Fundamental 708 (Climate Fund case), alongside the national Urban and Periurban Agriculture Policy and other normative texts. It concludes that ecological and climate protection duties, reinforced by these court precedents, require implementing and fostering urban agriculture in order to realize the right to a healthy climate.

Iasmin Emanueli Becker, Luciana Nunes de Oliveira, Jordana Marques Kneipp, Augusto Costa Bernardy, Edgar Cesar Rodrigues Maia, Juarez Felisberto · Revista Tópicos. · Brazil

As urban flooding, heat islands and water scarcity become more frequent in socioeconomically vulnerable peripheral areas, this qualitative case study analyzed how an agroecological community garden contributes to urban environmental resilience and efficient use of natural resources. Focusing on the Horta Comunitária Urbana Agroecológica Renova Vidas garden in Brazil, the study combined document analysis, non-participant observation and interviews, analyzed through content analysis. The garden was found to promote recovery of degraded land, conservation of natural resources and efficient water use, illustrating how local practices can contribute to urban resilience.

Ana Paula Branco do Nascimento, Rafael Silva de Araújo, Thais Reis Rocha, Ramoel Serafini · Revista Nacional de Gerenciamento de Cidades · Brazil

This applied, exploratory-experimental study designed and implemented a rainwater harvesting and irrigation automation system for food plant beds at a community garden ("Horta das Flores") under an impermeable roof in the eastern region of São Paulo, Brazil, aiming to reduce dependence on manual irrigation by volunteers. Developed through literature and technical review, field measurements, hydraulic efficiency tests, and component adjustments, the system was found to be technically and operationally feasible, ensuring regular water supply while reducing manual effort, and field evaluation enabled further hydraulic improvements and automation adjustments.

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

EPA's overview page for the Renewable Fuel Standard (RFS) program, created under the 2005 Energy Policy Act and expanded by the 2007 Energy Independence and Security Act, aimed at reducing greenhouse gas emissions, expanding the domestic biofuels sector, and reducing reliance on imported petroleum.

U.S. Environmental Protection Agency (EPA) · U.S. Environmental Protection Agency (EPA) · United States

This EPA page explains that green roofs can lower surface temperatures by up to 56°F, nearby air temperatures by up to 20°F, and indoor air temperatures by 27°F compared to conventional roofs, while cutting cooling loads by up to 70% and reducing runoff by 60-100%. The industry grew 5-15% from 2013-2019, with 763 projects covering more than 3.1 million square feet installed in 2019.

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

The EPA's Soak Up the Rain page states that green roofs can significantly reduce the amount of rainwater that would otherwise run off an impervious roof surface, and can also help reduce building energy usage and noise while increasing roof durability and lifespan compared to conventional roofs. It explicitly notes that structures must be able to support the loading of green roof materials under fully saturated conditions.