Research & reports

Alexis R. Cole, Jennifer Pethan, Jason Evans · Nutrients · United States

An integrative review examines the potential role of teaching kitchens operated in collaboration with local agriculture — including farms, community gardens, vertical farms, and urban agriculture — against the backdrop of diet-related chronic disease in the United States. The paper reviews the current state of agricultural systems, the food-is-medicine concept, consumer behavior, and the roles of each sector, followed by case studies illustrating how gaps between teaching kitchens and agriculture programs have been addressed. It summarizes opportunities for combining teaching-kitchen and agriculture-program knowledge and resources, along with challenges that may arise.

Ana Carla Alves Gomes de Almeida, Maria Lúcia Brito da Cruz · Revista Geonorte · Brazil

A study of Fortaleza, Brazil, examined urban agriculture initiatives in risk areas — including the municipal Hortas Sociais (Social Gardens) project — through literature review and field visits to project sites and relevant agencies. It found that introducing urban agriculture on vacant land in risk areas can help deter irregular occupation and, when incorporated into municipal policy, can provide income and food to the urban poor.

Leonor Ángeles Hernández, Mónica Leticia Acosta Miranda, Julio Pérez Machorro, Daniel Domínguez Estudillo, Leidys Fernández Arias · IPSUMTEC. · Mexico

A project in the eastern Morelos region of Mexico designs and builds urban/family gardens supported by Internet of Things (IoT) technology, primarily targeting small-scale farmers, homemakers, families, and older adults, aiming to let users remotely monitor gardens via mobile device or computer and reduce the time spent on routine care. The project is still under development, building prototype gardens of varying sizes and crops equipped with organic nutrients and an automated irrigation and monitoring system.

André Augusto Manoel, Carolina Andion · Cadernos Metrópole · Brazil

A qualitative intrinsic case study of Florianópolis, Brazil, examines the processes of social innovation generated by urban agriculture practices, using a pragmatist perspective and the analytical framework of ethnography of public arenas. Through a mapping of the city's urban agriculture practices, the study identifies three dynamics of social innovation situated in three distinct public arenas: solid organic waste, the human right to adequate food, and production-consumption cycles. These findings are presented as contributing to understanding the complexity of social innovation processes and their implications for governance in the city.

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.

Tibisay Pérez, Sintana E. Vergara, Whendee L. Silver · Scientific Reports · United States

Continuous micrometeorological mass-balance measurements of greenhouse gas emissions from commercial-scale windrow food-waste composting found emission factors of 6.6–8.8 kg CH4–C and 0.01 kg N2O–N per Mg of wet food waste, for a combined emission factor of 926 kgCO2e per Mg of dry food waste. Composting emissions were 38–84% lower than equivalent landfilling, with a projected minimum net savings of 1.4 MMT CO2e for California by 2025.

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.

U.S. Environmental Protection Agency (EPA) · U.S. Environmental Protection Agency, Office of Research and Development · United States

An EPA report that for the first time quantifies methane emissions attributable to food waste in U.S. municipal solid waste landfills from 1990 to 2020 (EPA-600-R-23-064). In 2020, food waste was responsible for about 55 million metric tons CO2e of landfill emissions and accounted for 58% of fugitive methane emissions from MSW landfills. Because food waste decays quickly, 50% of its carbon degrades within 3.6 years, often before gas collection systems are installed.

U.S. Environmental Protection Agency (EPA) · U.S. Environmental Protection Agency, Office of Research and Development · United States

This EPA report (October 2023, EPA-600-R-23-065) introduces the 'Wasted Food Scale,' a new ranking of eleven food waste management pathways from most to least environmentally preferable, replacing the 1990s 'Food Recovery Hierarchy.' It finds source reduction, donation, and upcycling most preferable, and that sewer/wastewater treatment and landfill stand out for their sizeable methane emissions.

Loudoun County · Loudoun County, Virginia · United States

Section 7.02 (Open Space) of the Loudoun County, Virginia zoning ordinance sets required open-space percentages by zoning district. In the Transition Policy Area, the TR-3UBF/LF, TR-1, and TR-2 districts require 50% open space, while TR-10 and TR-3LBR require 70%; in each of these districts, "Agricultural" use is one of the eligible open-space categories, conditioned on protection by a permanent conservation easement. Developments of five or more dwelling units must also provide at least 5,000 square feet of active recreation open space.

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.

NJBIZ · NJBIZ · United States

NJBIZ reported that Newark, New Jersey-based vertical farming company AeroFarms filed for Chapter 11 bankruptcy protection in Delaware federal bankruptcy court on June 8, 2023. It cited significant industry and capital-market headwinds, secured $10 million in debtor-in-possession financing from an existing investor group, and had announced 82 layoffs at its Newark headquarters two months earlier. Founder and CEO David Rosenberg stepped down, with CFO Guy Blanchard taking over.

AgFunderNews · AgFunderNews · United States

AgFunderNews reported that controlled-environment agriculture company AppHarvest filed for Chapter 11 bankruptcy protection on July 24, 2023. It posted a $176.6 million net loss for fiscal 2022, planned to sell its Berea farm to Mastronardi Produce for about $3.75 million, and aimed to sell its Morehead, Richmond, and Somerset facilities as well. It secured $30 million in debtor-in-possession financing from Equilibrium Capital, enabling operations to continue for 60 more days.

Seattle Department of Neighborhoods · Seattle Department of Neighborhoods · United States

This Seattle Department of Neighborhoods page traces the history of the city's P-Patch community garden program from its 1970 origins at the Picardo Farm through the city's 1973 purchase of the farm and 1974 formal establishment as a city program, growing to 90 gardens and over 3,500 participating households by 2023. It also reports 2022 figures including $66,152 in subsidies to 858 low-income gardeners and 44,403 pounds of donated produce.

Olivia G Bassetti, Rebecca A McDonough, Kabindra M Shakya · Environmental Monitoring and Assessment · United States (Philadelphia, Pittsburgh)

A 2023 study that sampled soils from 21 community gardens in Philadelphia city, the Philadelphia suburbs and Pittsburgh city, Pennsylvania, USA, in September–October 2021 and measured seven elements (Pb, Zn, Cu, V, Cd, Ni, As) by ICP-MS. City gardens had higher concentrations than suburban ones. All elements except vanadium fell below Pennsylvania Department of Environmental Protection guidelines, but against the stricter Canadian Council of Ministers of the Environment limit of 140 mg/kg for lead, 36% of Philadelphia city gardens, 60% of Pittsburgh gardens and 20% of Philadelphia suburban gardens exceeded it — so whether a garden counts as 'safe' or 'over the limit' depends on which standard is applied. In Philadelphia, concentrations generally fell with distance from historical smelter sites, though the correlation was significant only for zinc. Raised-bed soils were lower in lead and arsenic but often higher in zinc, copper, vanadium and nickel, which the authors attribute to ongoing deposition from road traffic and active industry rather than legacy contamination.

Superintendencia Nacional de Servicios de Saneamiento (SUNASS) · Superintendencia Nacional de Servicios de Saneamiento (SUNASS), Plataforma del Estado Peruano · Peru

Peru's sanitation services regulator (SUNASS) reported on 18 January 2023 that more than 635,000 people in Lima Metropolitana (6% of its population, including 180,000 children under 11) lack access to Sedapal's public drinking water network. Those without network access buy water from tanker trucks at 16-18 soles per cubic meter, up to six times the roughly 3 soles per cubic meter paid by network-connected users. SUNASS also published a district ranking of daily per-capita water consumption, with San Isidro highest at 280 liters and Lurigancho lowest at 32 liters.

Wells N., Myers B., Henderson C. · Preventive Medicine Reports (Elsevier) · United States

A two-year randomized controlled trial assigning 46 low-income elementary schools in Arkansas, Iowa, New York and Washington to school gardens with curriculum or a waitlist control. Children in the intervention increased fruit and low-fat vegetable consumption more than controls, supporting the effectiveness of school garden programs.

Joyner L., Yagüe B., Cachelin A., Rose J. · Journal of Agriculture, Food Systems, and Community Development 11(2):67-88 · United States

Community-engaged study partnering with a CSA farm in Salt Lake City's Westside, examining how political-economic practices produced food apartheid and the limits of urban agriculture in advancing food justice in marginalized neighborhoods.

Colson-Fearon B., Versey H. S. · International Journal of Environmental Research and Public Health 19(19):12752 · United States

Case study examining urban agriculture as a sustainable strategy against food insecurity in Baltimore, finding it builds social capital, educates residents on healthy eating, and facilitates distribution of affordable food toward food sovereignty.

Hawes J. K., Gounaridis D., Newell J. P. · Landscape and Urban Planning 225:104447 · United States

Analyzes the link between urban gardens and gentrification in Detroit, finding no clear association but showing gardens cluster in younger, affluent, educated, less-Black neighborhoods—gardening remains unequal.

Cosco N.G., Wells N.M., Zhang D., Goodell L.S., Monsur M., Xu T., Moore R.C. · Frontiers in Psychology, 13:993637 · United States (North Carolina)

An RCT of the Preventing Obesity by Design (POD) garden intervention in 15 Wake County childcare centers serving ages 3–5. Using a waitlist-control design, it tests effects on fruit and vegetable identification, liking and snack-time consumption, demonstrating collaborative garden-based outdoor learning in early childhood settings.

Manda S. · Journal of International Development · Zambia (Chongwe, Lusaka)

This study examines how Zambia's COVID-19 'new normal' policies disrupted peri-urban food production and market access near Lusaka, finding that ~53% of small-scale farmers reported zero agricultural income and that policy responses lacked systematic agricultural support.

Harvey S., Mount P., Valentine H., Gibson C. · Journal of Agriculture, Food Systems, and Community Development, 11(4):233-247 · United States

Interviewing 12 farmers who participated in a gleaning program and 16 who did not in the Greater Kansas City metro area, this study analyses motivations for and barriers to donating surplus produce to food-rescue organisations such as food banks. Participants cited ease of donating and tax incentives; non-participants cited safety and liability concerns. It informs the design of food-rescue schemes that redirect urban and peri-urban farm surplus to community food aid.

Ashley Conway, Christine Nieman · Urban Agriculture & Regional Food Systems · United States

This literature review identifies three key barriers to keeping livestock in US urban and peri-urban agriculture—animal feed resources, water quality and nutrient cycling, and use of heavy-metal-contaminated sites—and argues that agroforestry (silvopasture) practices can help address them. The authors propose two theoretical silvopasture systems, one for urban and one for peri-urban settings, and call for future whole-system research.