Research & reports

Gerald Quarcoo, Samuel Armoo, Augustina Angelina Sylverken, Matthew Glover Addo · PLOS ONE · Ghana

A study of 179 urban vegetable farmers in Accra (n=125) and Tamale (n=54), Ghana, with stool samples from 168 of them. Tamale recorded 0% soil-transmitted helminth infection, while Accra recorded Ascaris lumbricoides 5.1%, Ancylostoma duodenale 2.5% and Strongyloides stercoralis 0.8%. Not using personal protective equipment was strongly associated with infection (odds ratio 4.3, 95% CI 1.03–18.00, p=0.04); PPE use was 72% in Tamale versus 41% in Accra. The results indicate that occupational health risk in urban farming varies sharply by site and working practice. Limitations include farmers declining to give samples for superstitious reasons and the near-absence of prior studies on this population.

Amato-Lourenço L.F., Franca G.C., Seckler M.M., Mauad T. · Environmental Challenges, 14:100864 · Brazil

An analysis of a resident-led, decentralized community composting initiative begun in 2018 in São Paulo, using thermophilic decomposition (the UFSC method) in public squares. It presents a civil-society-driven waste-management model with positive environmental and social outcomes.

Shigetomi Y., Ishigami A., Long Y., Chapman A. · Nature Communications, 15:8987 · Japan

Demonstrates that per-capita household food waste in Japan rises with the age of the household head, reaching roughly three times higher for those 70+ than for those under 30, with correspondingly large differences in food-waste-related greenhouse gas emissions. It highlights the need for age-targeted food-loss reduction strategies in an ageing society.

Edwards F., Mercer H. · Local Environment (Taylor & Francis), 29(10) · Global

An ethnographic study of ShareWaste, an online community-composting platform in Sydney and Canberra that connects food-waste donors directly with households hosting compost heaps to divert waste from landfill. Drawing on environmental humanities and discard studies, it explores the relationships among people, soil, compost, and food waste and the community-building these practices foster.

Alessio Russo · Land Use Policy, 149, 107410 · Global

A conceptual paper extending the ecological-restoration paradigm of rewilding into urban and food contexts, arguing that multispecies-based 'urban rewilding' can simultaneously enhance climate resilience, biodiversity recovery, food-system robustness, water sensitivity and community participation. It also flags trade-offs such as green gentrification and land availability, opening new debate within productive green infrastructure.

Paturu P., Varadarajan S. · Science of The Total Environment · India

Combines product-service-systems thinking and life-cycle assessment to compare the environmental impacts of hydroponic urban-farming business models (greenhouse, indoor, cabinet selling with remote monitoring) for lettuce production in Tamil Nadu, India.

東京都国分寺市 · 国分寺市 環境報告書 · Japan

Kokubunji's annual environmental report under the basic environment plan, evaluating urban farmland preservation, local consumption and biodiversity while documenting municipally supported programmes such as the Citizen Agriculture University and citizen farms.

Carolyn A. Zeiner, Maria N. Kisch, Ethan D. Lynch, Paliza Shrestha, Gaston E. Small · Urban Agriculture & Regional Food Systems · United States (Minnesota)

This study characterized soil microbial activity profiles—microbial abundance, soil respiration, extracellular enzyme activity, and crop yield—in an urban agriculture system in Minnesota, USA, using recycled organic compost (manure or municipal) at high or low rates. A high application rate of manure compost supported 6–10× higher basal respiration, and microbial biochemical function predicted 50% of the variability in bell pepper yield while community size alone was a poor predictor, indicating that "more is better" does not necessarily hold for soil microbial health.

· Sustainability · Global

Evaluates crushed brick and crushed concrete of varying particle sizes as extensive green roof substrates through simulated drought and rooftop experiments, turning low-value construction waste into a growing resource.

· Recycling · Global

A scoping review of 68 open-access articles from 24 countries (2012–2022) mapping the reuse and recycling of alternative materials in green roof structures within a circular economy framework.

· Journal of Scientific Research and Reports · Global

Comprehensive analysis of urban agriculture's potential, challenges, and socio-economic impacts. Examines successful citizen-driven models and barriers to scaling.

· Frontiers in Sustainable Food Systems · South America

Study examining the use of urban food waste compost in urban agriculture in Rosario, Argentina. Analyzes waste-to-resource conversion and organic cycling potential.

· PhysOrg (Research Report) · Multi-regional (France, Germany, Poland, UK, USA)

International citizen science study recruiting farmers and gardeners at urban agriculture sites in France, Germany, Poland, UK, and USA. Participants recorded daily diary entries of inputs and harvests. Found that urban farms may have higher carbon footprints due to intensive inputs, suggesting need for optimization of composting and organic waste utilization to reduce environmental impact.

· The Professional Geographer · North America

Explores how home gardens in low-income communities unlock potential for urban sustainability. Analyzes interconnections between food access and environmental sustainability.

Terrile R., Martinez N., Brunotto F., Rizzi M., Scarpeci T., Tornaghi C. · Frontiers in Sustainable Food Systems · Rosario, Argentina

Analyses and characterises urban waste-based composts used on two city farms in Rosario, evaluating their use for soil fertility management in agroecological horticultural production.

Yang et al. · GeoHealth · United States (Massachusetts)

Decadal study of Boston's municipal composting program. Lead concentrations consistently exceeded EPA soil benchmarks. Program halted in 2012. Highlights importance of compost safety for urban agriculture.

Urban Agriculture Research Group · ResearchGate · Global

Investigates how rooftop gardening practices utilize small and unconventional spaces to increase cities' self-reliance in food production

Lima, P., Mwangi, E., Sousa, H., Park, J. · Nature Climate Change · Global

Global analysis of 250 agroforestry systems showing 4-8 tons CO2/ha/year sequestration compared to 0.5-1 ton for monoculture. Scaling could sequester 3-4 gigatons CO2 annually.

Sun Yeong Lee, H. S. Lee, Yong-Han Yoon, Jin-Hee Ju · Journal of people, plants, and environment · Global

This study analyzed the growth and quality of cherry tomatoes (CTs) and nasturtiums planted at different ratios (CTs only, 2:1, 1:1, 1:2, nasturtiums only) on rooftops and walls in building-integrated urban agriculture. Cherry tomatoes planted alone showed significant growth compared to companion planting. The 2:1 ratio of CTs to nasturtiums (C2N1) resulted in the highest plant weight and sugar concentrations for CTs on rooftops and walls, and nasturtiums also had larger leaves and flowers in this ratio. CTs generally grew better on walls than rooftops when companion planted with nasturtiums.

Roopika Sivaraman, Haritha Thulaseedharan Nair, Sharmila Krishnan, Perumal Siddhuraju · Soil and Sediment Contamination An International Journal · India (Coimbatore)

This study analyzed biocompost and water samples from four agricultural nurseries in semi-urban Coimbatore, India, for microplastic contamination using density separation and ATR-FTIR. While physicochemical properties met Indian standards, microplastic fragments (85%) and fibers (15%) were found in two biocompost samples (BC-B and BC-C), identifying PMMA, PP, and EVA polymers. No microplastics were detected in samples BC-A and BC-D, but the findings suggest semi-urban agricultural gardening may contribute to microplastic accumulation in terrestrial environments, potentially harming soil and plant health.

Darwison Daud, Zaini Zaini, Mohammad Khoiru Rusydi, Aulia Aulia, Novizon, Syukri Yunus, Rico Novendra, Mumuh Muharam, Athalla Novandri, Fatih Mubarok, Roza Susanti · Jurnal Andalas Rekayasa dan Penerapan Teknologi · Asia

In Sungkai Green Park Ecotourism, Padang City, lecturers and students from Andalas University implemented a Solar Dryer Dome for cultivating vegetables, fish, broiler chickens, and drying tea. This system, equipped with an IoT-based control system, resulted in efficient harvest times: vegetables in 21-27 days, approximately 1000 gourami fish per year, broiler chickens in 30 days, and dried tea in 8 hours, contributing to increased production efficiency, reduced operational costs, and improved product quality.

Eduardo Torres, Orientadora: MSc, Ana Maria Ferreira de Gomes, Efraim Lagos · Revista fisio&terapia. · Brazil

This research implemented Environmental Accounting as an educational tool at Pedro Aguirre high school in Manicoré, Brazil, to raise awareness about ecological issues and promote sustainable practices. Sustainable practices introduced included selective waste collection, educational signs, and the creation of a community garden. The methodology included exploratory and descriptive research with qualitative and quantitative analysis of students’ environmental education knowledge and the effectiveness of implemented practices.

Weonjung Sohn, Ibrahim El Saliby, Andrea Merenda, Sherub Phuntsho, Stefano Freguia, Jing Guan, Li Gao, Sungyun Lee, Ho Kyong Shon · Desalination and Water Treatment · Global

This study investigated the efficiency of urine-derived fertilizer compared to commercial fertilizers using three growing systems: nutrient film technique, pot-drench, and deep-water culture. The research found comparable growth responses in parsley, rhipsalis, coriander, and basil across various parameters like biomass and nutritional composition. Urine-derived fertilizers showed potential as a sustainable alternative to synthetic fertilizers.

Wahyu Halya Aprilia Putri, Renita Dwi Lestari, Prasmita Dian Wijayanti · Manfaat Jurnal Pengabdian Pada Masyarakat Indonesia · Indonesia (Semarang City)

Residents of RW 05 Jomblang, Semarang City, Indonesia, are increasingly concerned about plastic waste. As a solution, MBKM students implemented a program utilizing used plastic bottles as planting media in hydroponic techniques. This program reduced waste, supported sustainable agriculture by minimizing land and water use, and raised community awareness about eco-friendly urban farming. Evaluations showed tangible results, such as pakcoy plants being distributed to participants, suggesting significant benefits for the community.

Juan David Arosemena Polo, Susana Toboso‐Chavero, Biraj Adhikari, Gara Villalba · Waste Management · Spain (Barcelona)

This research determined the potential of organic municipal solid waste (OMSW) compost to supply nitrogen-phosphorus-potassium (NPK) demand for urban agriculture (UA) and its environmental benefits in the Metropolitan Area of Barcelona, Spain. Using spatial material flow analysis and life cycle assessment, it was found that the current waste management system could substitute 8% of total NPK demand with compost, reduce impacts by up to 39%, and yield 130% savings in global warming. A 2025 scenario could substitute 21% of NPK demand and reduce environmental impacts by up to 1,049%.