scholarly journals Appraising Agroecological Urbanism: A Vision for the Future of Sustainable Cities

2022 ◽  
Vol 14 (2) ◽  
pp. 590
Author(s):  
Acga Cheng ◽  
Nurul Syafiqah Noor Azmi ◽  
Yin Mei Ng ◽  
Didier Lesueur ◽  
Sumiani Yusoff
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Food Systems ◽  
Food System ◽  
Policy Makers ◽  
Effective Interactions ◽  
Sustainable Soil Management ◽  
The Face ◽  
Urban Heat ◽  
Best Fit

By the mid-century, urban areas are expected to house two-thirds of the world’s population of approximately 10 billion people. The key challenge will be to provide food for all with fewer farmers in rural areas and limited options for expanding cultivated fields in urban areas, with sustainable soil management being a fundamental criterion for achieving sustainability goals. Understanding how nature works in a fast changing world and fostering nature-based agriculture (such as low-input farming) are crucial for sustaining food systems in the face of worsening urban heat island (UHI) effects and other climatic variables. The best fit for the context is transformative agroecology, which connects ecological networks, sustainable farming approaches, and social movements through change-oriented research and action. Even though agroecology has been practiced for over a century, its potential to address the socioeconomic impact of the food system remained largely unexplored until recently. Agroecological approaches, which involve effective interactions between researchers, policy makers, farmers, and consumers, can improve social cohesion and socioeconomic synergies while reducing the use of various agricultural inputs. This review presents a timeline of agroecology transformation from the past to the present and discusses the possibilities, prospects, and challenges of agroecological urbanism toward a resilient urban future.

scholarly journals Acquisition, mobility, and food insecurity: Integrated food systems opportunities across urbanicity levels highlighted by COVID-19

2021 ◽  
pp. 1-15
Author(s):  
Yeeli Mui ◽  
Gabby Headrick ◽  
Samina Raja ◽  
Anne Palmer ◽  
Johnathon P. Ehsani ◽  
...  
Keyword(s):  
Food Insecurity ◽  
Rural Areas ◽  
Urban Areas ◽  
Food Systems ◽  
Food System ◽  
Cross Sectional Study ◽  
Food Distribution ◽  
Food Sources ◽  
Food Acquisition ◽  
Cross Sectional

Abstract Objective: Investigate acquisition and mobility experiences of food-insecure individuals across urbanicity levels (i.e., urban, suburban, rural) in the early months of the COVID-19 pandemic. Design: Cross-sectional study using a nationally representative online panel to measure where food-insecure individuals acquired food, food acquisition barriers, and mobility to food sources, which were evaluated across urbanicity levels using chi-squared tests and 95% CIs. Setting: United States Participants: 2,011 adults (18 years or older) Results: Food insecurity impacted 62.3% of adults in urban areas, 40.5% in rural areas, and 36.7% in suburban areas (p<0.001). Food acquisition barriers that were significantly more prevalent among food-insecure adults in urban areas were a change in employment status (34.2%; 95% CI = 27.2%, 41.1%; p<0.0001) and limited availability of food in retailers (38.8%; 95% CI = 31.7%, 45.9%; p<0.001). In rural areas, food-insecure adults primarily acquired food for the household from supercenters (61.5%; 95% CI = 50.4%, 72.5%; p<0.05), while locally sourced foods were less common among food-insecure adults in rural areas (6.9%; 95% CI = 0.01%, 13.0%) compared to urban areas (19.8%; 95% CI = 14.3%, 25.4%; p<0.01). Transportation as a barrier did not vary significantly by urbanicity, but food-insecure adults across urbanicity levels reported utilizing a range of transportations modes to acquire food. Conclusions: A planning approach that links urban and rural areas could address food insecurity by enhancing the integration of food production, transportation, and food distribution, building toward a more resilient and equitable food system for all Americans.

scholarly journals A New Estimation of Urbanization’s Contribution to the Warming Trend in China

2015 ◽  
Vol 28 (22) ◽  
pp. 8923-8938 ◽  
Author(s):  
Fang Wang ◽  
Quansheng Ge ◽  
Shaowu Wang ◽  
Qingxiang Li ◽  
Philip D. Jones
Keyword(s):  
Climate Warming ◽  
Rural Areas ◽  
Urban Areas ◽  
Warming Trend ◽  
Heat Island ◽  
Urban Station ◽  
Urbanization Effect ◽  
Urban Heat ◽  
Urban And Rural Areas ◽  
Urban Effects

Abstract The extent to which an urbanization effect has contributed to climate warming is under debate in China. Some previous studies have shown that the urban heat island (UHI) contribution to national warming was substantial (10%–40%). However, by considering the spatial scale of urbanization effects, this study indicates that the UHI contribution is negligible (less than 1%). Urban areas constitute only 0.7% of the whole of China. According to the proportions of urban and rural areas used in this study, the weighted urban and rural temperature averages reduced the estimated total warming trend and also reduced the estimated urban effects. Conversely, if all stations were arithmetically averaged, that is, without weighting, the total warming trend and urban effects will be overestimated as in previous studies because there are more urban stations than rural stations in China. Moreover, the urban station proportion (68%) is much higher than the urban area proportion (0.7%).

scholarly journals Food system sustainability and vulnerability: food acquisition during the military occupation of Kuwait

2015 ◽  
Vol 18 (16) ◽  
pp. 3060-3066 ◽  
Author(s):  
Fahhad Alajmi ◽  
Shawn M Somerset
Keyword(s):  
Urban Areas ◽  
Food Systems ◽  
Food System ◽  
Local Population ◽  
Local Environment ◽  
Cross Sectional Study ◽  
Military Occupation ◽  
Snowball Sampling ◽  
Food Acquisition ◽  
Cross Sectional

AbstractObjectiveTo document food acquisition experiences during Iraqi military occupation in Kuwait.DesignRetrospective cross-sectional study.SettingUrban areas in Kuwait during occupation.SubjectsThose living in Kuwait during the period of occupation, and aged between 15 to 50 years at the time of occupation, recruited by snowball sampling. A total of 390 completed questionnaires (response rate 78 %, 202 female and 188 male) were returned.ResultsDuring the occupation, food became increasingly difficult to acquire. Two food systems emerged: (i) an underground Kuwaiti network linked to foods recovered from local food cooperatives and (ii) a black market supplied by food imported through Iraq or stolen locally. Food shortages led to reductions in meal size and frequency. Some respondents (47·7 %) reported not having sufficient income to purchase food and 22·1 % had to sell capital items to purchase food. There was a significant increase (P<0·01) in home production, with 23·1 % of people growing vegetables and 39·0 % raising animals to supplement food needs. Reduction in food wastage also emerged as a significant self-reported behaviour change. Respondents reported deterioration in the quality and availability of fish, milk, and fruit in particular. Despite a decrease in opportunities for physical activity, most respondents reported that they lost weight during the occupation.ConclusionsAlthough the Kuwaiti population fell by about 90 % and domestic food production increased during the 7-month occupation, the local population continued to rely heavily on imported food to meet population needs. The high prevalence of self-reported weight loss indicates the inadequacies of this food supply. High apparent food security in systems which significantly exceed the ecological carrying capacity of the local environment and rely on mass food importation remains vulnerable.

The Internet in developing nations: Grand challenges (originally published in April 2004)

First Monday ◽  
2007 ◽  
Author(s):  
Larry Press
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Developing Nations ◽  
The Internet ◽  
Grand Challenge ◽  
Pilot Studies ◽  
Policy Makers ◽  
Grand Challenges ◽  
Developed Nations

This is a call for a "Grand Challenge" project for achieving truly global connectivity. For over a decade, we have hypothesized that the Internet could raise the quality of life in developing nations. We have conducted hundreds of studies of the state of the Internet and "e–readiness," done extensive training of technicians and policy makers, run pilot studies, and held local, regional and global conferences and workshops. After all of this activity, Internet connectivity is nearly non–existent in rural areas of developing nations, and far below that of developed nations in the urban areas of developing nations. This is not to say the activity of the past decade has been a waste. We have demonstrated the value of the Internet and raised awareness. The United Nations and the administrations of nearly all nations have acknowledged the potential of the Internet. The way has been paved, and it is time to act on what we have learned. After outlining the work of the last decade, we explore one possible Grand Challenge: Connecting every village in the rural developing world to the Internet using a strategy similar to that used in building the NSFNet. We speculate on wireless technologies that might play a role in working toward that goal: Terrestrial, high–altitude platform, and satellite. We conclude with a brief discussion of alternative Grand Challenges and a call for action. The time is ripe for an audacious project. What could we achieve with US$15 billion and ten years time?

Locating the locale of local food: The importance of context, space and social relations

2014 ◽  
Vol 30 (6) ◽  
pp. 563-576 ◽  
Author(s):  
Brídín E. Carroll ◽  
Frances Fahy
Keyword(s):  
Social Relations ◽  
Rural Areas ◽  
Urban Areas ◽  
Food System ◽  
Local Food ◽  
Social Contexts ◽  
Spatial Proximity ◽  
Future Research ◽  
Structured Interviews ◽  
Urban And Rural Areas

AbstractLocalization is one process/outcome that is proffered as key to the ‘grand challenges’ that currently face the food system. Consumers are attributed much agency in this potential transformation, being encouraged from all levels of society to exert their consumer muscle by buying local food. However, due to the social construction of scale it cannot be said that ‘local food’ is a definite entity and consumers understand the term ‘local food’ differently depending on their geographic and social context. As such, the research upon which this paper is based aimed to provide a nuanced understanding of how consumers in the particular spatial and social contexts of urban and rural Ireland understood the concept of ‘local food’. A specific objective was to test the theory that these consumers may have fallen into the ‘local trap’ by unquestioningly associating food from a spatially proximate place with positive characteristics. A three-phase mixed methodology was undertaken with a sample of consumers dwelling in urban and rural areas in both Dublin and Galway, Ireland: 1000 householders were surveyed; 6 focus group discussions took place; and 28 semi-structured interviews were carried out. The results presented in this paper indicate that for most participants in this study, spatial proximity is the main parameter against which the ‘localness’ of food is measured. Also, it was found that participants held multiple meanings of local food and there was a degree of fluidity in their understandings of the term. The results from the case study regions highlight how participants’ understandings of local food changed depending on the food in question and its availability. However, the paper also indicates that as consumers move from one place to another, the meaning of local food becomes highly elastic. The meaning is stretched or contracted according to the perceived availability of food, greater or lesser connections to the local producer community and the relative geographic size of participants’ locations. Our analysis of findings from all three phases of this research revealed a difference in understandings of local food among participants resident in urban and rural areas: participants dwelling in rural areas were more likely than those in urban areas to define local food according to narrower spatial limits. The paper concludes with an overview of the practical and theoretical significance of these results in addressing the current dearth of research exploring the meaning of local food for consumers and suggests avenues for future research.

scholarly journals Climate change over UK cities: the urban influence on extreme temperatures in the UK climate projections

2021 ◽  
Author(s):  
William J. Keat ◽  
Elizabeth J. Kendon ◽  
Sylvia I. Bohnenstengel
Keyword(s):  
Urban Heat Island ◽  
Rural Areas ◽  
Land Surface ◽  
Urban Areas ◽  
Climate Model ◽  
Climate Projections ◽  
Heat Island ◽  
Night Time ◽  
Urban Heat ◽  
The Uk

AbstractIncreasing summer temperatures in a warming climate will increase the exposure of the UK population to heat-stress and associated heat-related mortality. Urban inhabitants are particularly at risk, as urban areas are often significantly warmer than rural areas as a result of the urban heat island phenomenon. The latest UK Climate Projections include an ensemble of convection-permitting model (CPM) simulations which provide credible climate information at the city-scale, the first of their kind for national climate scenarios. Using a newly developed urban signal extraction technique, we quantify the urban influence on present-day (1981–2000) and future (2061–2080) temperature extremes in the CPM compared to the coarser resolution regional climate model (RCM) simulations over UK cities. We find that the urban influence in these models is markedly different, with the magnitude of night-time urban heat islands overestimated in the RCM, significantly for the warmest nights (up to $$4~^{\circ }$$ 4 ∘ C), while the CPM agrees much better with observations. This improvement is driven by the improved land-surface representation and more sophisticated urban scheme MORUSES employed by the CPM, which distinguishes street canyons and roofs. In future, there is a strong amplification of the urban influence in the RCM, whilst there is little change in the CPM. We find that future changes in soil moisture play an important role in the magnitude of the urban influence, highlighting the importance of the accurate representation of land-surface and hydrological processes for urban heat island studies. The results indicate that the CPM provides more reliable urban temperature projections, due at least in part to the improved urban scheme.

scholarly journals The Influence of Vegetation on UHIs, MUHIs, and Microclimate of Selected Southern Cities

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 509A-509
Author(s):  
Derald A. Harp ◽  
Edward L. McWilliams
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Building Materials ◽  
Urban Heat Islands ◽  
Shopping Malls ◽  
Heat Islands ◽  
Suburban Areas ◽  
Winter Temperatures ◽  
Urban Heat ◽  
The City

Urban areas have average annual temperatures 2–3°C warmer than surrounding rural areas, with daily differences of 5–6°C common. A suggested reason for this temperature difference is the extensive use of concrete, asphalt, and other building materials in the urban environment. Vegetation can moderate these temperatures by intercepting incoming radiation. The influence of vegetation patterns on the magnitude of urban and micro-urban “heat islands” (UHI and MUHI, respectively) is compared for several cities including Houston, Austin, College Station, and Ft. Worth, Texas; Huntsville, Ala.; and Gainesville, Fla. Temperatures for all cities studied were greatest in the built-up areas and dropped off in suburban areas and adjacent rural areas. In Houston, surrounding rice fields were 3–5°C cooler than urban areas. Heavily built-up areas of Austin were 2–4°C warmer than parks and fields outside of the city. In all of the cities, large parks were typically 2–3°C cooler than adjacent built-up areas. Large shopping malls varied in nocturnal winter and summer temperature, with winter temperatures near door openings 2–3°C warmer, and summer daytime temperatures as much as 17°C cooler beneath trees. This effect seemed to persist at the microclimatic scale. Areas beneath evergreen trees and shrubs were warmer in the winter than surrounding grass covered areas. Video thermography indicated that the lower surfaces of limbs in deciduous trees were warmer than the upper surfaces. Overall, vegetation played a significant role, both at the local and microscale, in temperature moderation.

scholarly journals Urban Heat Island and Its Interaction with Heatwaves: A Review of Studies on Mesoscale

2021 ◽  
Vol 13 (19) ◽  
pp. 10923
Author(s):  
Jing Kong ◽  
Yongling Zhao ◽  
Jan Carmeliet ◽  
Chengwang Lei
Keyword(s):  
Rural Areas ◽  
Urban Areas ◽  
Anthropogenic Activities ◽  
Urban Heat Islands ◽  
Mitigation Measures ◽  
Rapid Urbanization ◽  
Pollution Dispersion ◽  
Vegetation Fraction ◽  
Holistic Review ◽  
Urban Heat

With rapid urbanization, population growth and anthropogenic activities, an increasing number of major cities across the globe are facing severe urban heat islands (UHI). UHI can cause complex impacts on the urban environment and human health, and it may bring more severe effects under heatwave (HW) conditions. In this paper, a holistic review is conducted to articulate the findings of the synergies between UHI and HW and corresponding mitigation measures proposed by the research community. It is worth pointing out that most studies show that urban areas are more vulnerable than rural areas during HWs, but the opposite is also observed in some studies. Changes in urban energy budget and major drivers are discussed and compared to explain such discrepancies. Recent studies also indicate that increasing albedo, vegetation fraction and irrigation can lower the urban temperature during HWs. Research gaps in this topic necessitate more studies concerning vulnerable cities in developing countries. Moreover, multidisciplinary studies considering factors such as UHI, HW, human comfort, pollution dispersion and the efficacy of mitigation measures should be conducted to provide more accurate and explicit guidance to urban planners and policymakers.

scholarly journals The urban heat island effect is closely related to cicada density in metropolitan Seoul

2017 ◽  
Author(s):  
Hoa Q. Nguyen ◽  
Yuseob Kim ◽  
Yikweon Jang
Keyword(s):  
Urban Heat Island ◽  
Rural Areas ◽  
Urban Areas ◽  
Underlying Mechanism ◽  
Heat Island ◽  
Population Densities ◽  
Island Effect ◽  
Significant Difference ◽  
Order Of Magnitude ◽  
Urban Heat

Background. Cryptotympana atrata and Hyalessa fuscata are the most abundant cicada species in the Korean Peninsula, where their population densities are higher in urban areas than in rural ones. The urban heat island (UHI) effect, wherein human activities cause urban areas to be significantly warmer than surrounding rural areas, may underlie this difference. We predicted a positive relationship between the degrees of UHI in urban areas and population densities of C. atrata and H. fuscata. Methods. To test this prediction, we examined cicada population densities in three groups: those of high and low UHI areas within metropolitan Seoul, and suburban areas. Enumeration surveys of cicada exuviae were conducted from July to August, 2015. Results. C. atrata and H. fuscata constituted almost 30% and 70% of the cicada populations, respectively, collected across all sampling localities. No significant difference in species composition was observed, regardless of groups, but the densities of the two species were significantly higher in urban areas with high UHI than in other groups. Specifically, densities of C. atrata in high UHI areas were approximately seven and four times higher compared to those in low UHI and in suburban groups, respectively. The order of magnitude was greater in H. fuscata, where densities in high UHI group were respectively 22 and six times higher than those in low UHI and in suburban groups. Discussion. These results suggest that the UHI effect may be closely linked to high cicada densities in metropolitan Seoul, although the underlying mechanism for this remains unclear.

scholarly journals City-Region Food Systems and Second Tier Cities: From Garden Cities to Garden Regions

2020 ◽  
Vol 12 (6) ◽  
pp. 2532
Author(s):  
Koen van der Gaast ◽  
Eveline van Leeuwen ◽  
Sigrid Wertheim-Heck
Keyword(s):  
Rural Areas ◽  
Food Systems ◽  
Food System ◽  
Urban System ◽  
Theory And Practice ◽  
City Region ◽  
Sustainable Food ◽  
Garden Cities ◽  
Contextual Elements ◽  
Second Tier

Theory and practice show that second-tier cities can play an important role in linking the urban and the rural. Second-tier cities are the middle ground of the urban system. The smaller spatial scale of second-tier cities, and their often-stronger connections with the rural hinterland can potentially enable a more sustainable food system. In this paper, we argue that the extent to which the benefits ascribed to the re-localisation of food can be achieved greatly depends on the contextual specifics of the second-tier city and the region in which it is embedded. Furthermore, we argue that to reach resilient, healthy and environmentally friendly city region food systems, three contextual elements need to be considered in their mutual coherence: (1) the historical development of the second-tier city and the region; (2) the proximity of food production to the second-tier city; (3) the scale and reach of the city region’s food system. We use the case-study of the Dutch city Almere to show how (a controlled) growth of cities can be combined with maintaining (or even increasing) the strength of adjacent rural areas. Such cities can play a role in creating Garden Regions: regions that foster healthy, sustainable and resilient food systems and that do not just connect urban and rural regions, but also connect city region food systems to national and global markets.

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