Research & reports

Ana Tereza Souza Domingos, Carolina Oliveira Mesquita, Emiliano Lôbo de Godoi, Thiago Augusto Mendes · Laws · Brazil

This bibliographical and documentary research analyzed the effectiveness of public food security policies in Brazil between 2012 and 2022, also considering urban agriculture as an alternative. It concluded that public policies were gradually weakened, and from 2019 to 2022, the Brazilian government discouraged food policy implementation. Consequently, Brazil faces food insecurity and hunger due to disjointed policies, the pandemic, and an economic crisis.

Davide Marino, Francesca Curcio, Francesca Benedetta Felici, Giampiero Mazzocchi · Land · Italy (Rome)

This paper proposes agroecological assessment as a tool for formulating evidence-based local food policies, adapting the Tool for Agroecology Performance Evaluation (TAPE) model on a sample of 20 farms in the city-region food system of Rome, Italy. Data analysis showed that agroecological principles are not fully adopted by the majority of farms considered in Rome. Additionally, farms with the highest agroecological level are mainly driven by social factors and have a lower propensity for innovation, which could hinder the transformation process of food systems.

Juan Camilo Ochoa Céspedes · Entorno Geográfico · Colombia (Medellín)

This paper critically analyzes peri-urban and peri-urban agriculture, addressing problems of territorial tension resulting from the accelerated expansion of real estate into peri-urban areas due to low urban land availability. The discussion questions the economic, environmental, and social risks of this expansion, highlighting tensions and resistance. The paper illustrates these issues with examples from the peri-urban area of Medellín and its metropolitan area.

Naoual Zerrari, Naoual Raïs, Mustapha Ijjaali · Soil and Sediment Contamination An International Journal · Morocco (Fez)

Nine soil samples from agricultural soils in Fez-Upstream, Morocco, were analyzed to assess concentrations of major elements, Rare Earth Elements (REEs), and heavy metals. The soils were enriched by light REEs, and the contamination factor and degree of contamination indicated moderate and low contamination, respectively. However, all sampling sites showed PLI values above 1, indicating obvious anthropogenic pollution due to human activities.

Natalie Call, Elizabeth Silber, E. Binney Girdler · Journal of Agriculture Food Systems and Community Development · United States

This GIS-based study of Kalamazoo, Michigan, analyzed how accessibility to different types of food access points — full-service grocery stores, farmers markets, community gardens, food pantries, and convenience stores — differed between low-income and higher-income census tracts. All full-service grocery stores were accessible via bus routes, but 11% of residents in low-income areas lacked adequate access, living beyond the 0.25-mile walkable distance to bus routes. "Positive" access points such as community gardens, food pantries, and farmers markets were found to be concentrated in areas that already had grocery store access, whereas "negative" access points — convenience and dollar stores, which provide lower-quality, highly processed food — filled the access gap in lower-income areas instead. More than twice as many low-income residents had walkable access to convenience stores as higher-income residents, with 81% of those convenience stores located within low-income tracts.

Michael G. Parkes, Rebekah O’Rourke, Tiago Domingos, Ricardo F. M. Teixeira · Sustainability · Europe

An experimental indoor vertical farm urban-agriculture project involving 27 stakeholder groups was set up in a university building in Lisbon, Portugal in 2018 and closed in 2022; this study analyzed the governance dimension of the project's sustainability using role-constellation mapping of the stakeholder groups and force-field analysis across seven governance factors to understand why the project did not continue. It found that despite early positive outcomes across environmental, social and economic dimensions, the project failed to establish a network of stakeholders consistently engaged in governance from the outset, and that inadequate project culture and a lack of critical governance factors led to a failure to convey a sense of ownership to stakeholders, contributing to the project's closure.

CHRISTINA FELIX KIFUNDA · Asian Journal of Agriculture · Tanzania

Combining 30 years of temperature and rainfall data from the Tanzania Meteorological Agency with a questionnaire survey of 386 urban-agriculture households across five wards of Kinondoni City (Bunju 118, Kunduchi 42, Mabwepande 102, Mzimuni 28, Wazo 96), plus focus group discussions, key informant interviews and direct observation, this study examined climate change's effects on urban crop production and farmers' adaptation strategies. More than 70% of surveyed smallholder farmers were aware of climate change indicators, consistent with the meteorological data, citing rising temperature (76%) and declining rainfall (73%); pests and diseases were ranked highest (88%) among significant climate-change effects. Land scarcity was also identified as a significant challenge for urban agriculture, and pesticide and fertilizer use was the most commonly cited adaptation strategy (65%).

Luiza Vigne Bennedetti, Paulo Antônio de Almeida Sinisgalli, Maurí­cio Lamano Ferreira, Fabiano Lemes de Oliveira · International Journal of Environmental Research and Public Health · Global

Following the PRISMA protocol, a 2023 systematic review evaluated 26 studies on the interplay between urban agriculture (UA) and sustainability surveyed on Web of Science. While UA is increasingly recognized as an action to promote urban sustainability and inform public health policy for urban populations, the review confirms that its implementation still presents challenges in countries across both the Global North and Global South. The review identified numerous key challenges to UA adoption, including air and soil contamination, availability of green areas, layout of urban infrastructure, and food distribution, among others. Given the many socio-economic and environmental contextual factors involved — especially when comparing Global North and Global South realities — the review concludes there is a need to develop a model adaptable to these different contexts. It further concludes that the concept of sustainability lacks a universal understanding, and that one of the most important remaining gaps is addressing social issues in relation to environmental ones.

Mahir Yazar, Ece Baykal Fide, İrem Daloğlu Çetinkaya · Journal of Environmental Policy & Planning · Turkey

A 2023 study of climate policies in nine cities in Turkey examined how vulnerable groups and individuals are identified and how land-use policy is developed to address the identified vulnerabilities and climate justice concerns, using policy content analysis and expert interviews. The analysis found critical relationships between identified vulnerable groups, responsive land-use policy and climate justice. While social-aid municipalism-related vulnerabilities dominated districts' climate policies, nature-based solutions (NBS) — especially green infrastructure and urban agriculture — emerged as the dominant climate adaptation approach. However, the way urban vulnerabilities are prioritized in the climate and sustainability plans places less emphasis on intersectionality and infrastructure-related vulnerabilities, and tokenism of justice occurs in the policy documents: the plans do not incorporate vulnerable communities into land-use planning. The study concludes that the complexity of responsive land-use policy requires greater awareness of how to practically support vulnerable communities.

Jesús Sanz Abad, Sara Sama Acedo, Gaël Carrero Gros · · Spain

Case studies of two cooperative enterprises (in finance and forestry) and one new urban commons — community gardens in Madrid — all located in Spain, were analyzed using ethnographic methods within the field of solidarity economy and commons. The analysis found tensions between the initiatives' economically and politically "transformative" aspirations and the reality of operating in a market-driven capitalist environment, alliances and tensions arising from interactions with established institutions, and dilemmas or conflicts between maintaining ideological coherence and extending the initiatives' social base.

Lukas Egli, Judith Rüschhoff, Joerg A. Priess · Frontiers in Sustainable Food Systems · Global

A systematic review of quantitative empirical research on the sustainability effects of community-supported agriculture (CSA) covered 39 studies. Fewer than 30% of the studies assessed ecological sustainability aspects, but where CSA farms were compared to reference systems, they mostly performed better on resource use efficiency and greenhouse gas emissions. Most studies assessed social aspects; many showed that CSA still fails to reach low-income households, so members do not represent the average population, while CSA membership was associated with improved health and sustainability behavior. Economic variables were assessed in more than half of the studies, but knowledge of CSA's relative economic performance remains scarce, though early studies indicate high economic viability. The review calls for more research on ecological aspects specifically, comparisons across farming and marketing systems, and integration of knowledge from theses and practical sources in multiple languages.

Habtamu Serbessa, Teferee Mekonnen, Meskerem Abi · Journal of Developing Country Studies · Ethiopia

A questionnaire survey and focus group discussions with small-scale vegetable producers in Addis Ababa, Ethiopia used probability sampling, descriptive statistics, correlation and multinomial logistic regression, plus SWOT and force field analysis. Producers held positive perceptions of vegetable production and most intended to continue, but limited access to land, pests and diseases, and water shortages were identified as the main challenges. Regression results showed land size, gender, age and housing type as the most significant factors determining vegetable production.

Aikaterini N. Martini, Μ. Papafotiou, Ioannis Massas, Nikoleta Chorianopoulou · Plants · Greece

Origanum dictamnus, a perennial herb endemic to Crete, Greece, was grown at two cultivation sites in Athens — an extensive green roof and ground level next to a moderate-traffic road — in two substrate types at 10 cm depth, to examine growth along with nutrient content (N, P, K, Na) and heavy metal accumulation (Cu, Pb, Ni, Mn, Zn, Fe) in its tissues. Plant growth was favored by the soil substrate but was also satisfactory in the soilless substrate. Cultivation site affected heavy metal accumulation, with higher concentrations found in leaves and flowers at street level, though no differences appeared in roots. Washing reduced heavy metal concentrations only in leaves grown at street level. Substrate type significantly affected manganese concentration in all tissues and iron concentration in roots, with the highest values in the soil substrate. The species could be cultivated on sustainable green roofs, preferably on a soilless substrate to reduce structural weight, but careful selection of the cultivation site was identified as necessary to minimize contamination with environmental pollutants when human consumption is intended.

Stacy M. Philpott, Azucena Lucatero, Sofie Andrade, Cameron R. Hernandez, Peter Bichier · Insects · United States (California)

This study examined how native plant species richness, garden management, and landscape composition affect the abundance and richness of native and non-native bees, ladybeetles, ants, and ground-foraging spiders in urban community gardens (urban agroecosystems) in California, United States. Native plants — about 10% of species but only about 2.5% of plant cover — had little influence on arthropods overall, with the only significant effect being a negative one on non-native spider richness, likely reflecting native plants' low cover. Garden size increased native and non-native bee abundance and richness and non-native spider richness; floral abundance increased non-native spider abundance and native and non-native spider richness; mulch cover and tree/shrub abundance increased non-native spider richness; and natural habitat cover increased non-native bee and native ant abundance but was associated with fewer native ladybeetle species. The study concludes that native plant richness does not strongly influence the abundance and richness of beneficial arthropods.

Nancy Harlet Esquivel-Marín, Leticia Myriam Sagarnaga Villegas, Octavio T. Barrera-Perales, Juan Antonio Lugo Machado, José María Salas González · Acta Universitatis Sapientiae Agriculture and Environment · Europe

This bibliometric review analyzes the systemic structure of multifunctional agriculture (MFA) and its relationship to sustainability, based on a sample of 432 documents published on the Web of Science platform. Using Bibliometrix and VOSviewer to map scientific collaboration networks, the review identified the authors, journals, and countries shaping the current knowledge structure and four thematic clusters: (a) MFA and sustainability, (b) ecosystem services and biodiversity, (c) European public policies, and (d) governance and urban agriculture. It concludes that, despite an increase in publication rates, research remains concentrated in Europe with few collaborative networks across disciplines, indicating that SDG 17 (partnerships) is not being achieved.

Arun Kafle, James Hopeward, Baden Myers · Sustainability · Global

An integrated modelling framework using proxy measures for economic benefit (net margin), social benefit (full-time farmer employment equivalent per consumer) and environmental benefit (CO2 emission reduction) was applied to two contrasting development settings, Adelaide, Australia, and the Kathmandu Valley, Nepal, to examine the characteristics of urban agriculture (UA). Using two-stage optimisation across three mechanisation levels (non-mechanised, garden tiller, garden cultivator), two purposes (gardening or commercial), two crop-value categories and two market mechanisms, the model found that no single UA form maximises economic, environmental and social (employment) objectives simultaneously: commercial UA, in which both land and labour are costed, was favoured for maximising profit or reducing CO2 emissions, while gardening-form UA was favoured for maximising employment participation. In Adelaide the model favoured commercial UA for best-case profit and carbon emissions but gardening UA for employment maximisation, while in the Kathmandu Valley the model selected gardening UA under the given assumptions.

Ambroise Dalecky, Madougou Garba, Abdoulaziz Ibrahim Danzabarma, Jonas Etougbétché, Sylvestre Badou, Henri‐Joël Dossou, Ibrahima Sow, Cheikh Tidiane Niang, Ousmane Diene, Idrissa Diallo, Mohamed Seyidna Ali Saghiri, Mohamed El Hady Sidatt, Frank van Steenbergen, Amadou Bocar Bal, Luwieke Bosma, Gualbert Houémènou, Solimane Ag Atteynine, Karmadine Hima, Gauthier Dobigny, Yonas Meheretu · Environnement Risques Santé · Sub-Saharan Africa

The abstract text provided consists only of acknowledgments—thanking Valérie Golaz (INED-LPED), Marc Egrot (IRD-LPED), and the organizers of the international conference "Implementation of public policies and pesticides in the Souths" (PoPPesCI project, on public policies and pesticides in urban agriculture), held in October 2021 in Bouaké, Côte d'Ivoire, for prompting the article's writing. It contains no actual findings or content about rodent proliferation or synthetic chemical rodenticides despite what the title suggests.

Caroline Verfuerth, Angelina Sanderson Bellamy, Barbora Adlerová, Amy Dutton · Frontiers in Sustainable Food Systems · United Kingdom

Failures of the current food system are described as sitting at the core of multiple overlapping crises, shaping both consumption choices and food production, with low-income households disproportionately affected—their food security and access to healthy, sustainable food impacted as a result. Community-supported agriculture (CSA) is framed as a bottom-up response toward agri-food system transformation, an alternative food system built on locally sold, agroecologically grown food rooted in social values, and, alongside other food citizenship movements and alternative food networks (AFNs), driven by a vision of a democratic, socially and economically just, environmentally sustainable food system. Yet low-income households are underrepresented in the CSA community. This paper reports findings from a co-produced intervention between the research team, four CSA farms in Wales, United Kingdom, and two food aid partners, seeking ways to improve CSA membership accessibility for food-insecure households: 38 households received a weekly vegetable bag for two to four months, and 16 household members were interviewed at the project's start and at the end of the harvest season. Using a food well-being framework, the study found that CSA membership holistically improved food well-being by strengthening producer-consumer relationships, increasing availability of healthy foods, helping people care for their own and their families' well-being, and building place-based food capability and literacy—results the authors use to support calls for prioritizing food well-being interventions to benefit financially excluded, food-insecure households within localized AFNs.

P. Post, H. Hengsdijk · · Global

This study inventoried and characterized food production systems in Rincon, Bonaire, combining literature review and online key-informant interviews with biophysical analysis and calculations of land and water requirements for several production scales, and applying a SWOT analysis to multiple production systems. It found that increasing year-round fruit and vegetable production in Rincon, and Bonaire more broadly, is challenging and may not be feasible without support, given limited and irregular water availability, an unsupportive business environment, and harsh conditions from pests, diseases, and weather; without sufficient support to expand water availability, local agricultural knowledge, and a suitable business environment, neither capital-intensive nor small-scale crop production is likely to improve the availability of healthy food or employment opportunities.

Veronica Sebald, Julia M. Schmack, Monika Egerer · Renewable Agriculture and Food Systems · Germany

This study surveyed the occurrence of poisonous plant species in 30 urban community gardens across two German cities, Berlin and Munich, and examined concerns around poisonous and highly poisonous plants in urban garden settings. It found that plants producing substances toxic to humans occur in these gardens while also potentially holding ecosystem-functioning and biodiversity-conservation value, creating a trade-off with the ecosystem service of human health promotion, and concludes that poisonous plants should be carefully monitored and managed—depending on garden participants and the goals of the garden organization—to mitigate health risks while still supporting biodiversity conservation.

Lorien Nesbitt, Daniel L. Sax, Jessica Quinton, Leila M. Harris, Camilo Ordóñez Barona, Cecil Konijnendijk · Ecology and Society 28(4): art29 · Canada (Metro Vancouver, Greater Toronto Area)

An online survey of 51 urban greening practitioners in Metro Vancouver and the Greater Toronto Area. Most respondents defined green gentrification as the displacement of vulnerable residents caused by new or improved green space that attracts wealthy in-movers and raises property values. The largest group identified greening itself as the main driver of green gentrification, while a minority saw greening as a secondary factor alongside other systemic drivers. Practitioners cited multiple barriers to addressing it - limited institutional capacity, limited access to data and information, policy or mandate restrictions, and a lack of engagement tools - showing a gap between practitioners' concern and what they can act on in their day-to-day work.

Jordan Ashby, Clarissa Libertelli · Institute for Local Self-Reliance (ILSR) · United States

Just after NYC announced expansion of mandatory residential organics collection by 2024, the mayor's office eliminated funding for the city's community composting program. The article identifies three failures reflecting national trends: government 'composting' programs that actually rely on anaerobic digestion, centralized processing that concentrates environmental burdens in vulnerable neighborhoods, and mandatory government programs undercutting community composters' viability.

Cole Rosengren · Waste Dive · United States

California's Little Hoover Commission recommended pausing SB 1383, the state's organics recycling law, citing concern the state will miss its 2025 targets, but CalRecycle, industry and environmental advocates strongly opposed the pause, noting roughly $500 million already invested. 445 of 614 jurisdictions now have residential food-waste collection programs, and waste costs rose 20% for residential and 30% for commercial customers.

Li Jiacheng · Eco-Business / Dialogue Earth · China

China's mandatory waste-sorting policy, launched in Shanghai in 2019, improved diversion and recycling but created a new problem: overbuilt waste-to-energy incineration capacity. Shanghai diverted 54% of its waste (6.46 million tonnes) in 2021, up from 21% in 2018, while the number of national incinerators grew from 130 in 2011 to 927 by 2023, pushing 2022 national overcapacity to 100.99%.

Jena Brooker · Planet Detroit (via BridgeDetroit) · United States

Hantz Woodlands, a large-scale tree farm on Detroit's east side, acquired roughly 2,600 parcels and still holds about 2,000. It bought an initial 1,550 parcels for $540,000 and later resold about 10% of its holdings for $9.5 million — nearly nine times its original cost — while paying only $7,035 of the $33,110 it owes in blight-violation fines. Critics note the Detroit Land Bank Authority never reclaimed a single Hantz property despite missed deadlines, even as it repossessed land from ordinary residents who fell behind.