Green roofs against pollution and climate change. A review

Li, Yanling; Babcock, Roger W.

doi:10.1007/s13593-014-0230-9

Cited by 104 publications

(59 citation statements)

References 53 publications

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“…As for alternate uses of roof space, rooftop greening has received popular attention with many local governments as a way to combat urban air pollution (for review, see Li and Babcock, 2014), but if it is merely gardening, it most likely does not generate direct profits. As for solar energy, current technology should be able to generate~546 Wh/day/m 2 using the most efficient solar panels (Li et al 2013).…”

Section: Cost Of Productionmentioning

confidence: 99%

“…With respect to the environment, a recent review on urban green roofing describes positive effects on urban settings, including helping to clean the air of dust and smog and converting CO 2 to O 2 (Li and Babcock, 2014). As for rooftop vegetables, the experimental data from Taylor et al (2012) of growing lettuce in a 19-m 2 net shack led to an estimate that if all of Manila's metropolitan area lettuces (1248 t annually) were supplied by roof hydroponics,~2000 t of CO 2 would be reduced through reduced food miles and air conditioning (from lowering building temperature).…”

Section: Introductionmentioning

confidence: 99%

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Rooftop production of leafy vegetables can be profitable and less contaminated than farm-grown vegetables

Liu

Yang

Han

et al. 2016

Agron. Sustain. Dev.

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Urban agriculture may solve issues of feeding urban populations. In China, for example, densely packed mega cities will continue to expand in number and size, necessitating increasing food miles. Interestingly, it has been estimated that the total rooftop space in China is about 1 million hectares, some of which can be converted for rooftop farming. Yet, despite some favorable reports on urban farming, the Chinese commercial sector has shown little interest. This may be explained by the dearth of data comparing urban and conventional farming. Therefore, we present here a feasibility study of hydroponically grown vegetables in a rooftop screen house in Guangzhou, China. From December, 2012 to May, 2014, we tested the production of seven leafy vegetables that are easily perishable and are not well suited to long-distance transport. We calculated the production cost and measured biochemical parameters. Results show that levels of vitamin C, potassium, calcium, magnesium, iron, zinc, and crude fiber were comparable to market counterparts. None of the roof hydroponic vegetables exceeded the maximum residue limit for lead, arsenic, cadmium, chromium, mercury, or nitrate. In contrast, 5 of 98 market vegetables were contaminated by exceeding the maximum residue limit for lead. Similarly 3 were contaminated for arsenic, 23 for nitrate, and 2 for organophosphate or carbamate insecticide. Compared to high-end vegetables sold on the market, rooftop-grown vegetables were competitive in cost and quality. Given that many countries have limited arable land to feed a large population, the widespread adoption of rooftop hydroponics could help expand the total area available for food production as well as meet the rising demand for safe high-quality vegetables.

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Section: Cost Of Productionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rooftop production of leafy vegetables can be profitable and less contaminated than farm-grown vegetables

Liu

Yang

Han

et al. 2016

Agron. Sustain. Dev.

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“…We also believe that interventions at an individual level, such as green or white roofs, are one of the best strategies to reduce the impacts of the UHI in highly urbanized cities. 31 It is evident that the variation in the heat slope of the temperature-mortality curve depends on latitude. 32 The manner in which the heat slope varies within a city is, however, unclear.…”

Section: Discussionmentioning

confidence: 99%

Green Space and Deaths Attributable to the Urban Heat Island Effect in Ho Chi Minh City

et al. 2018

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Objectives. To quantify heat-related deaths in Ho Chi Minh City, Vietnam, caused by the urban heat island (UHI) and explore factors that may alleviate the impact of UHIs.Methods. We estimated district-specific meteorological conditions from 2010 to 2013using the dynamic downscaling model and calculated the attributable fraction and number of mortalities resulting from the total, extreme, and mild heat in each district. The difference in attributable fraction of total heat between the central and outer districts was classified as the attributable fraction resulting from the UHI. The association among attributable fraction, attributable number with a green space, population density, and budget revenue of each district was then explored.Results. The temperature-mortality relationship between the central and outer areas was almost identical. The attributable fraction resulting from the UHI was 0.42%, which was contributed by the difference in temperature distribution between the 2 areas. Every 1-squarekilometer increase in green space per 1000 people can prevent 7.4 deaths caused by heat. urban and surrounding rural areas. The UHI effect can also be observed within a city (i.e., when the inner city is warmer than the outer city). People living in urban areas, especially the inner areas of cities, are subsequently exposed to excessive heat. From a health perspective, this is concerning because it can increase heat-related mortality and morbidity risks. More than half of the global population lives in urban areas, and this proportion is expected to rise to 85% by 2100. 5 Therefore, the impact of UHIs on human health could be substantial and will likely be amplified in the future. In this study, we focused on the UHI effect within a city. Previous studies have investigated heat-related mortality variations within particular cities; however, they either lack spatial temperature data at finer scales (such as at the district level within a city) 6-8 or neglect district-specific mortality. 9 This has hindered their ability to compare the mortality-temperature association between the central and outer districts of the same city. In addition, to our knowledge no study has directly quantified the magnitude of the UHI effect on mortality (i.e., the number of deaths attributable to the UHI effect). City authorities are now considering some UHI mitigation activities, such as land-use planning and tree planting. 10 These activities, however, need to be supported by empirical studies that can answer questions such as "To what extent does the UHI effect cause mortality?" and "To what extent can the planting of trees/green space prevent deaths caused by the UHI effect?" Here, we examine these questions by quantifying the deaths attributable to the UHI effect in Ho Chi Minh (HCM) City, Vietnam, and exploring factors that may alleviate UHI impacts. HCM City is a tropical megacity undergoing rapid urbanization, and it is the most populous city in Vietnam; thus, it offers an interesting setting for this study.

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“…En general, la Tmr suele ser similar a la del aire interior, pero si hay algunas superficies relativamente calientes como las losas en verano o frías como los muros en invierno, donde complementan Li et al (2014), que conviene calcular la Tmr ponderada, según la temperatura neutral (Tn).…”

Section: Estudios De Monitoreo Y Tipificaciónunclassified

Calificación ambiental de la vivienda. Estrategias de adaptabilidad higrotérmica

Pérez

2016

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ResumenLa calificación ambiental térmica es el procedimiento mediante el cual se evalúan las consecuencias de la implantación, ampliación, modificación o traslado de las actividades y elementos al interior de la vivienda estudio de caso, para comprobar y determinar las medidas correctoras o precautorias necesarias para prevenir o compensar sus posibles efectos térmicos sobre los espacios. Donde se argumentará que la climatología urbana y el sistema constructivo establecen el ambiente higrotérmico. Se observa y monitorea los valores térmicos y su oscilación, de consigna fijada para invierno y verano. Con base en los resultados se determina el comportamiento anual de temperatura y humedad relativa medio mensual así como las estrategias de adaptabilidad y la clasificación higrotérmica. El trabajo metodológicamente es una investigación experimental aplicada, donde los diferentes métodos se apoyan en varios tipos como el documental, de campo y descriptivo. El objetivo de la presente investigación es determinar la calificación ambiental térmica únicamente de temperatura y humedad relativa, al interior de la vivienda común en Tampico, México. Palabras clave: Adaptabilidad climática; características constructivas; zona constanteRecepción: 30-06-2015 Aceptación: 23-11-2015 Fuentes Pérez, C. AbstractThermal environmental rating is the process by which the consequences of the implementation, expansion, modification or removal of activities and elements within the housing case study, to try and determine the corrective or precautionary measures necessary to prevent or evaluated compensate possible thermal effects on the spaces. Where it will argue that urban climatology and establish constructive system hygrothermal environment. It observes and monitors the thermal and values your swing, setpoint set for winter and summer.Based on the results of the annual performance average monthly temperature and relative humidity as well as strategies of adaptability and hygrothermal rating is determined. The experimental work is methodologically applied research, where different methods rely on various types as the documentary field and descriptive. The objective of this research is to determine the thermal environmental qualification only temperature and relative humidity inside the common housing in Tampico, Mexico.

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Green roofs against pollution and climate change. A review

Cited by 104 publications

References 53 publications

Rooftop production of leafy vegetables can be profitable and less contaminated than farm-grown vegetables

Rooftop production of leafy vegetables can be profitable and less contaminated than farm-grown vegetables

Green Space and Deaths Attributable to the Urban Heat Island Effect in Ho Chi Minh City

Calificación ambiental de la vivienda. Estrategias de adaptabilidad higrotérmica

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