Urban Food Research Articles

Urban food (In)security and the role of migrant informal food waste recyclers in Delhi

Urban food systems in developing countries like India are rife with inequalities that preclude food security for all. In this context, the paper examines the role played by informal workers in the ‘circular economy’ for food in improving the accessibility of food and urban food security in Delhi, India. Evidence from an informal street market close to one of the country's largest urban wholesale markets of food grains, pulses and spices in Delhi reveals rare details of how urban food waste plays a significant role in the livelihood strategies of the city's poor migrants while also contributing to the urban food security of the low-income households. Although there is a growing recognition that the street food sector plays an important role in urban food security, the vital role played by waste collectors, home-based workers and street vendors in restoring discarded food grain, pulses and spices, and bringing them back into the urban food system has been largely invisible. This invisibility extends to the gendered segregation of work in food waste recycling, where our study found that predominantly women undertake labour-intensive and lower paid tasks at the bottom of the hierarchy. The paper provides an overview of the nature of informal livelihood, the contribution of informal workers and challenges and opportunities in the urban circular economy for food. However, their contributions are often overshadowed by health and safety concerns about the reuse of discarded food. Further, an analysis of the current policy landscape in urban India also indicates that informal workers are marginalised in the circular economy for food. While the state owes these informal workers support and protection for their contribution to the ‘Circular economy’ for food and urban food security, any effort to sustain these practices would need to incorporate adequate health and safety procedures.

Securing Survivability for Urban Poor: A Review on Food Accessibility and Food Affordability

There are multifaceted challenges, including poverty, international and domestic food supply disruptions, labor shortages, global economic crises, natural disasters, and burgeoning global population, precipitating a formidable food security predicament. This predicament manifests in the form of compromised affordability, unreliability in accessibility, and inadequacy of available nutritious sustenance. This study is part of a larger study exploring affordable food supply via accessibility, particularly for the urban poor in Malaysia. The purpose of this study is to analyze how policymakers could improve food affordability via food accessibility for the urban poor. This study reports a desktop survey using the systematic literature synthesis process based on the keywords "urban poor", "food accessibility", and "food affordability". The results found that urban poor could improve food security by utilizing their local supply chain (LSC) with a selective coping strategy (CS). The results led to the developing a proposed Urban Poor Secured Survivability Model. This study is significant because the results identified the limitations among the urban poor in accessing nutrient-rich, safe, affordable and quality local food. The benefits of this study include guiding potential local supply chain development with local food resources. It is recommended that future studies develop a local supply chain for urban poor food security and propose a management system to enable its successful implementation.

Enhancing Leafy Greens’ Production: Nutrient Film Technique Systems and Automation in Container-Based Vertical Farming

Urban agriculture has emerged as a crucial strategy to address food security and sustainability challenges, particularly in densely populated areas. This study focused on enhancing leafy greens’ production, specifically lettuce (Lactuca sativa L.) and arugula or rocket (Eruca sativa L.), using Nutrient Film Technique (NFT) systems and automation in container-based vertical farming. The study utilized a 20-foot shipping container retrofitted to create a thermally insulated and automated growth environment equipped with energy-efficient LED lighting and precise climate control systems. The results demonstrated significant improvements in crop yields, with the NFT systems achieving productivity up to 11 times higher than traditional methods in protected horticulture. These systems enabled continuous cultivation cycles, responding to the high market demand for fresh local produce. Moreover, the integration of low-cost sensors and automation technologies, each costing under USD 300, ensured that the environmental conditions were consistently optimal, highlighting this approach’s economic feasibility and scalability. This low-cost framework aligns with industry standards for affordable technology, making it accessible for small- to medium-sized urban agriculture enterprises. This study underscores the potential of vertical farming as a sustainable solution for urban food production. It provides a model that can be replicated and scaled to meet the growing demand for healthy, locally grown vegetables.

The Influencing Mechanism of Household Food Purchasing Behavior and Household Reserve Efficiency under Non-Normal Conditions

Family reserves are an important part of national reserves, and how to do a good job in family reserves is a common concern of the government and society. Under the non-normal conditions of major accidents and disasters, wars, plagues, social unrest, etc., urban food supply mainly depends on external supply guarantee, and urban residents’ risk perception is more sensitive. Based on the Theory of Planned Behavior and Norm Activation Model, this study constructs an analytical framework for the risk perception, perceived behavior control, and family reserve efficacy of urban residents under non-normal conditions from the perspectives of rationality and sensibility, self-interest, and altruism. The perceived behavior control of household food reserves in non-normal conditions is affected by risk perception, subjective norms, and personal norms. On this basis, countermeasures and suggestions are put forward: Urban residents should strengthen their sense of risk and responsibility for storing food at home, reserve food appropriately, and develop a good habit of family saving. On the other hand, it is necessary to pay attention to personal norms, reduce the negative impact of subjective norms on residents, and avoid excessive food storage and food waste.

Urban Food Deserts and Cardiovascular Health: Evaluating the Impact of Nutritional Inequities on Elderly Populations in Santiago

This study examines the link between food deserts and cardiovascular health in older adults in Santiago’s Metropolitan Region, Chile. As the population ages and chronic diseases rise, understanding the impact of food accessibility on health is essential. Using multiscale geographically weighted regression, we analyzed data from the Cardiovascular Health Program, socioeconomic indicators, and food desert maps, sourced from the Chilean Ministry of Health and other databases. Spatial analysis, including Voronoi diagrams, assessed the influence of food deserts on health outcomes. Findings show a significant correlation between limited access to healthy foods and higher cardiovascular disease rates, especially in economically disadvantaged areas. The regression model is significant to contribute to the explanation of disease prevalence, emphasizing the impact of food availability on health. This study highlights the importance of considering spatial factors in urban planning and public health policies. By showcasing the role of food environments in health disparities, it advocates for integrated health interventions. Targeted urban planning to address food deserts can enhance access to healthy foods, improving cardiovascular health and well-being among Santiago’s elderly. The findings provide insights for policymakers to create healthier urban environments and stress the need for sustainable food systems to support public health.

Integrating vertical farm into low-carbon high-rise building in high-density context: A design case study in Hong Kong

Today's world faces multiple challenges, including climate change, biodiversity loss, and food security. In addition, in the post-pandemic era, there is an urgent need to re-design urban habitats to reduce the epidemic's enduring impacts and reconnect citizens with healthy community activities. As a city with the top population density level in the world, Hong Kong is home to many high-rise communities. This article took the architectural design competition “Green Tower Hong Kong” as an entry point to discuss the technical feasibility and design strategies of integrating high-rise residential buildings with urban agriculture to improve urban food security, enhance on-site solar energy utilization, and develop a sustainable residential environment conducive to low-carbon living and working. The issue of how to improve the dietary structure of Hong Kong residents and reconnect them through space design was focused. Finally, taking the site of Kwun Tong Center as the case study, a resilient residential high-rise building integrated with shared gardens and greenhouses was proposed with a technical-oriented methodology and optimization framework. The final design of mixed-use buildings can provide apartments for 2500 individuals, produce 340,750 kg of vegetables with 156 % self-sufficiency, and generate electricity of 1,080,000 kWh annually. This paper examines strategies for integrating urban agriculture into high-rise residential buildings in high-density urban environments. It proposes a technology-based design optimization method, offering a reference for future explorations of low-carbon, resilient communities.

A qualitative exploration of food choice motives of urban indigenous food gatekeepers in Fiji: Implications for the use of the food choice questionnaire

Pacific Island Countries (PICs) have exceptionally high rates of obesity and non-communicable diseases. The causes are complex but one prominent factor is the notable shift from traditional plant and seafood diets to diets high in unhealthy processed foods. Literature is sparse on the motives behind food choice decisions of Pacific Islanders. The widely used Food Choice Questionnaire (FCQ) (Steptoe et al., 1995) is a multi-dimensional tool capturing nine potential food choice motives. This study used a hybrid thematic analysis. Fourteen in-depth semi-structured interviews with urban indigenous Fijian mothers were conducted to (1) explore how the nine FCQ motives impact food choice (2) to examine conceptual equivalence of the nine FCQ motives and (3) to identify additional food choice motives, not captured in the FCQ. Mothers identified seven of the nine FCQ motives (i.e., health, mood, convenience, sensory appeal, weight control and familiarity) and three new food choice motives (i.e., food that is filling, religious dietary restrictions and food quality) as important determinants of food choice. Moreover, while choosing foods that promote health and well-being was identified as an important food choice motive, mothers also identified four other motives, that they considered important, which lead to over-eating and unhealthy eating. Food choice is a complex, layered decision, driven by multiple considerations, some more important than others. These findings can inform diet-related interventions and policy within this community. Adapting the FCQ for broader PIC use through further qualitative exploration in PICs, and validating the adapted FCQ with larger samples will enhance its utility in measuring food choice motives in PICs.

Driving Analysis and Multi Scenario Simulation of Ecosystem Carbon Storage Changes Based on the InVEST-PLUS Coupling Model: A Case Study of Jianli City in the Jianghan Plain of China

The carbon storage capacity of terrestrial ecosystems serves as a crucial metric for assessing ecosystem health and their resilience to climate change. By evaluating the effects of land use alterations on this storage, carbon management strategies can be improved, thereby promoting carbon reduction and sequestration. While county-level cities are pivotal to ecological conservation and high-quality development, they often face developmental challenges. Striking a balance between economic growth and meeting peak carbon emissions and carbon neutrality objectives is particularly challenging. Consequently, there is an urgent need to bolster research into carbon storage management. The study focuses on Jianli City, employing the InVEST model and land use data to examine the response patterns of land use changes and terrestrial system carbon storage from 2000 to 2020. Using the PLUS model, the study simulated the land use and carbon storage in Jianli City for the year 2035 under three scenarios: Natural Development scenario, Urban Expansion scenario, and Ecology and food security scenario. Our findings indicate the following: (1) Between 2000 and 2020, significant shifts in land use were observed in Jianli City. These changes predominantly manifested as the interchange between Cropland and Water areas and the enlargement of impervious surfaces, leading to a decrease of 691,790.27 Mg in carbon storage. (2) Under the proposed scenarios—Natural Development scenario, Urban Expansion scenario, and Ecology and food security scenario—the estimated carbon storage capacities in Jianli City were 39.95 Tg, 39.90 Tg, and 40.14 Tg, respectively. When compared with the 2020 data, all these estimates showed an increase. In essence, our study offers insights into optimizing land use structures from a carbon storage standpoint to ensure stability in Jianli’s carbon storage levels while mitigating the risks associated with carbon fixation. This has profound implications for the harmonious evolution of regional eco-economies.

The contribution of urban farming to urban food security: the case of “Buruan SAE”

ABSTRACT This study focuses on urban farming practices in Bandung, West Java, known as Buruan SAE, a programme initiated by the Department of Food Security and Agriculture, Bandung. The objectives of this study are to analyse the effects of urbanisation on urban farming and to explore the potential of urban farming in supporting food security. This study uses a qualitative approach. The results of the study show 3 important issues: the diverse production of urban farming is able to meet the food needs of community members and some have already become independent farmers; there has been a change in the attitude of the people of Bandung city, through urban farming they have become ‘farmers’ a completely new activity for them; urban farming provides a source of income for the urban community. These findings suggest that urban farming can enhance the sustainability of the Buruan SAE community.

Dynamic changes of food environment: In and out of COVID-19 pandemic

The outbreak of the COVID-19 pandemic has precipitated food crises worldwide, prompting a re-examination of the resilience of the urban food environment. While previous research on the urban food environment has predominantly focused on Western contexts, scant attention has been given to China. This study takes Shenzhen, China as an example to establish a food environment evaluation framework centered on accessibility, diversity, and healthiness factors, aiming to analyze the dynamic changes of the food environment during normal and pandemic periods. By using the GA optimization algorithm, some convenience stores are transformed into self-pickup points (SPPs), which is expected to eliminate the deserts risk areas (DRAs) with low cost and high efficiency. The findings reveal a distinctive “center-periphery” spatial structure characterizing the food environment in Shenzhen, and the improvement of healthiness plays a crucial role in sustaining food oases and ameliorating food swamps. This research provides methods for improving the resilience of the food environment during the pandemic across diverse nations, bolstering the security of urban lifeline systems.

Burmese migrant domestic workers’ foodwork and biopedagogies in pandemic Singapore

COVID-19 not only increased food insecurity across the globe but has also given rise to pandemic-induced “biopedagogies,” a concept premised on conflating health with instructions on the “bios,” including how to live healthily, what to eat, and how much. Based on 24 qualitative interviews with low-waged migrant domestic workers (MDWs) in Singapore hailing from Myanmar, we explore how migrant women articulate and develop their own biopedagogical practices under pandemic-constrained circumstances. While live-in MDWs are invariably involved in preparing food for employers’ families as part of their care duties, and despite originating from historically food-producing regions, they are vulnerable to urban and cultural food insecurities at destination sites of migration given their diminished rights and subordinate positions in the household. Yet, these migrant women express agency in enacting counter-practices through their foodwork in at least two ways. First, MDWs cultivate self-care through cooking and consuming home foods during the pandemic and negotiating enough fortifying food for themselves while living in employers’ households. Secondly, through remittance-sending to left-behind families and children, they enact long-distance maternal carework through foodwork for health. We uncover how MDWs’ foodwork achieve a measure of food security despite language barriers, limited economic resources, lack of access to culturally appropriate foods at destination, and distance from their families. Experiencing vulnerability in terms of their occupational position, their plate, and the pandemic, this paper uncovers the stressors in achieving food security and health for themselves and families’ while working in Singapore.

Food democracy and the right to the city: Re-assembling urban food environments in East-Central London

Under the banner of “the right to the city,” scholars and activists reclaim the rights of urban dwellers to access, use and shape their urban space. However, few studies have examined how this right to the city is interpreted, negotiated and exercised in practice. To address this gap, we explore democratisation processes that aim to increase popular control over the production of urban food environments. Based on a case study of East-Central London and using assemblage thinking as an analytical framework, this article explores how more democratic food environments are being (dis)assembled. Our findings highlight the complexity of (dis)assembling practices, which are shaping a partial and fragile version of urban (food) democracy, shifting control away from capitalist structures but, at the same time, relying on state's support for co-designing and co-managing democratic food environments.

Carbon emissions from urban takeaway delivery in China

Online food delivery has become a popular mode of urban food consumption in China as its underlying business mechanism, Online To Offline (O2O), gaining popularity. However, the environmental impacts of a rapidly expanding online food delivery industry and its potential to mitigate environmental burdens remained unexplored in China. Our research found that Chinese cities generated 1.67 MtCO2-equivalent (CO2e) from 13.07 billion times of deliveries in 2019, including transport and packaging. The transportation-related GHG emissions were 745 KtCO2e in 2019, with an average of 0.057 kg CO2e per order and an average of 0.011 kg CO2e per capita. These emissions have surged from 0.31 MtCO2e in 2014 to 2.74 MtCO2e in 2021. We predict that this figure will increase further to 5.94 MtCO2e by 2035. However, with a range of policies such as replacing motorcycles with electric bikes and optimizing traffic routes, it is possible to mitigate such GHG emissions by 4.39–10.97 MtCO2e between 2023 and 2035. These findings highlight the need for further research into the environmental impact of online food delivery and the potential for mitigating it.

Improved water management can increase food self-sufficiency in urban foodsheds of Sub-Saharan Africa

Rising urban food demand in Sub-Saharan Africa will put pressure on local resource boundaries, such as the available land area and water resources. In assessing the extent to which urban centres can source from nearby areas in future, earlier analysis has concentrated on agronomic measures, aiming at yield gap closure. Here, we address the potential of local water conservation measures to help achieve food self-sufficiency in Sub-Saharan Africa by 2061–2070, along the concept of urban ‘foodsheds’, matching crop-based food supply and demand in the surroundings of large cities for all major food groups. We find that ambitious but plausible levels of water conservation, primarily raising productivity on rainfed lands, have the potential to increase overall food production by 12% and food self-sufficiency levels in all major foodsheds to over 75%, with the region as a whole becoming self-sufficient. The increase in production could limit the projected required expansion of agricultural land use by more than 25%, which has important implications for biodiversity, land use-related conflicts and carbon sequestration.

A Review of Grease Trap Waste Management in the US and the Upcycle as Feedstocks for Alternative Diesel Fuels

As byproducts generated by commercial and domestic food-related processes, FOGs (fats, oils, and grease) are the leading cause of sewer pipe blockages in the US and around the world. Grease trap waste (GTW) is a subcategory of FOG currently disposed of as waste, resulting in an economic burden for GTW generators and handlers. This presents a global need for both resource conservation and carbon footprint reduction, particularly through increased waste upcycling. Therefore, it is critical to better understand current GTW handling practices in the context of the urban food–energy–water cycle. This can be accomplished with firsthand data collection, such as onsite visits, phone discussions, and targeted questionnaires. GTW disposal methods were found to be regional and correspond to key geographical locations, with landfill operations mostly practiced in the Midwest regions, incineration mainly in the Northeast and Mid-Atlantic regions, and digestion mainly in the West of the US. Select GTW samples were analyzed to evaluate their potential reuse as low-cost feedstocks for biodiesel or renewable diesel, which are alternatives to petroleum diesel fuels. Various GTW lipid extraction technologies have been reviewed, and more studies were found on converting GTW into biodiesel rather than renewable diesel. The challenges for these two pathways are the high sulfur content in biodiesel and the metal contents in renewable diesel, respectively. GTW lipid extraction technologies should overcome these issues while producing minimum-viable products with higher market values.

Advances in Vertical Farming: Opportunities and Challenges

Vertical farming has emerged as a promising solution to address the challenges of food security, sustainability, and urbanization in the 21st century. This innovative approach to agriculture involves growing crops in vertically stacked layers within controlled environments, optimizing space, resources, and yields. Vertical farming represents a significant innovation in agriculture, designed to meet the challenges of urban food production with enhanced efficiency and sustainability. This study examines recent technological advancements in vertical farming, emphasizing methods such as automation. By growing crops in vertically stacked layers within controlled environments, vertical farming maximizes space utilization and minimizes resource consumption. The results indicate substantial improvements in crop yields and quality, along with reduced water and pesticide use. Additionally, the proximity of vertical farms to urban centers shortens supply chains, lowering transportation costs and carbon emissions. The discussion highlights the economic benefits, including year-round production and premium pricing for pesticide-free produce, alongside the challenges of high initial investments and energy demands. The environmental impacts are also considered, noting significant reductions in land use and water consumption compared to traditional farming. This review underscores the potential of vertical farming to contribute to global food security and sustainable urban development, while addressing the need for further research and collaboration to overcome existing barriers. The findings suggest that continued innovation and supportive policies are crucial for the widespread adoption and success of vertical farming practices.

Productivity potential and economic feasibility of small-sized tomato production in plant factories with artificial lighting: A comparative study with high-tech greenhouse production

Plant factories with artificial lighting (PFALs) are hailed as a hope for a sustainable urban food supply system. However, this emerging industry is facing a challenge: What crops other than leafy vegetables can PFALs produce commercially? A promising candidate is small-sized tomatoes (ss-tomatoes), which some high-tech greenhouses (HTGHs) are producing. To examine the crop performance and economic viability of ss-tomato production in PFALs, we attempted a comparative analysis based on experiments conducted in a PFAL and an HTGH, along with a Dutch Report on HTGHs. The results show that ss-tomato production in HTGHs is economically viable in the Netherlands but not yet in our HTGH in Japan. The factor that explains the difference is the yield per plantable area. For our HTGH to be economically viable, the present yield of 30 kg/m2/year must be increased to 50 kg/m2/year. The economic performance of ss-tomato production in our PFAL is lower than that of our HTGH, despite its higher yield of 56 kg/m2/year. To attain the same economic performance, our PFAL must achieve a yield as high as 150 kg/m2/year. If PFALs were to provide a stable supply of safe foods to the growing urban population, they should attain higher yields, no matter how challenging it may be.

Urban farming and food supply: A comparative review of USA and African cities

Urban farming plays a crucial role in addressing food security challenges in both developed and developing regions. This comparative review explores the dynamics of urban farming and its impact on food supply in two diverse contexts: the United States (USA) and African cities. The study investigates the unique challenges and opportunities faced by urban farming initiatives in these regions, considering factors such as infrastructure, socio-economic conditions, and agricultural practices. In the USA, urban farming has gained momentum as a sustainable solution to enhance local food production and reduce the carbon footprint associated with long-distance food transportation. The analysis delves into the policies, technological advancements, and community engagement strategies that have contributed to the success of urban farming in American cities. Additionally, the study examines the integration of rooftop gardens, vertical farming, and community-supported agriculture in the USA's urban landscape. Conversely, African cities grapple with distinct challenges in implementing and sustaining urban farming practices. The review explores the impact of rapid urbanization, limited resources, and diverse climatic conditions on the feasibility of urban agriculture in African contexts. Strategies such as community empowerment, micro-financing, and knowledge sharing are examined to understand their role in overcoming obstacles and fostering resilient urban farming systems. Keywords: Urban Farming, Food Supply, Sustainable Agriculture, USA, African Cities, Urbanization, Community Engagement, Agricultural Practices, Food Security, Comparative Analysis.

Are apps for urban food purchasing and consumption meeting Italian consumers' needs? A mixed‐methods analysis

AbstractThe number of mobile phone apps downloads, especially those in the food and drink category, is growing worldwide. Such growth in digitalisation has brought the food industry and retailers to try and understand consumers new shopping needs and preferences to offer the best virtual experience to purchase food online. Past research rarely explore the features of the currently available apps for purchasing and consumption of agro‐food products compared with consumers' perception, barriers and drivers of online purchasing. The present research aims to fill this gap, in three steps. First, investigating consumers' perceptions of apps currently available for food purchasing and consumption, as well as drivers and barriers towards of online food purchasing and towards online food shopping from (peri)urban initiatives using the theory of consumer values as a theoretical framework (Study 1). Second, analysing the features of existent apps used at (peri)urban level and/or supporting (peri)urban food purchasing and consumption adopting the technology acceptance model as a theoretical framework (Study 2). Third, cross‐analysing consumer needs emerging from the survey with apps features. Quantitative data elaboration included a cluster analysis to group apps based on their features, and principal component analysis to identify consumers' key barriers and drivers. Results support how the desire to eat fresh and seasonal food is the main driver for buying from (peri)urban agriculture initiatives, whereas a more rational and aware food consumption are the drivers for choosing online over in person shopping. The most common type of apps are those aimed at food delivery, and those selling and buying food and providing food information. Restaurants and cafes are the main market channels for consumers' food online purchasing. When consumer needs (Study 1) and apps features (Study 2) are compared, a mismatch of the two emerges. Sustainability food profile and information on seasonal food are consumers' favourite features, but they are present in a limited number of apps. Results provide insights for marketing strategies and future research.

Scenario Analysis of Food Phosphorus Footprint in Kisumu, a Lakeside East African City in Lake Victoria (Kenya).

Increased food production and consumption patterns have resulted in higher urban food phosphorus footprints, leading to a series of resource and environmental problems worldwide. We quantified the food phosphorus footprint of the African city of Kisumu using substance flow analysis. Our aim was to develop Kisumu's sustainable phosphorus management framework so that the city would reduce phosphorus losses into the food system. Our results show that in the year 2023, the import and export of food phosphorus in the Kisumu food system was 2730.26 ± 2.7% t P yr-1 and 3297.05 ± 2.4% t P yr-1, respectively. There was -566.79 ± -18% t P yr-1 food phosphorus deficit in the Kisumu food system. Crop planting subsystem runoff/leaching/erosion loss, household consumption subsystem waste loss, and pit latrine subsystem blackwater loss are the major pathways of phosphorus losses into the environment and the main contributors to the food phosphorus footprint in the city. The 2030 scenario analysis shows that implementing a comprehensive scenario scheme throughout the entire lifecycle process from phosphorus input to waste disposal is the best choice for reducing phosphorus losses and suppressing the growth of food phosphorus footprint in the future. Our study shows that the food phosphorus footprint in the Kisumu food system was 0.67 kg P cap-1yr-1 in 2023, which is still at a low level but may enter a continuous upward trend with the improvement of socio-economic development of the city. In our framework, we have proposed a few essential measures that include urine separation, installation of septic tank, adjustment of dietary structure, flexible layout of sanitary disposal facilities, and separation of organic waste streams to reduce food phosphorus footprints in Kisumu. Given the similarity of cities along the shores of Lake Victoria, our calculation methods and management strategies can be applied to other cities in the region.