The Three Pillars Of Sustainability

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2.4.2 Environmental Sustainability and Urban greening
The meaning of Environmental Sustainability is deeply rooted in Morelli’s concept of the three pillars of sustainability shown in Figure 2.4. Figure 2.4 (b): The Three Pillars of Sustainability (Morelli, 2011)
According to the above concept for complete sustainability problem to be solved, all three pillars of sustainability must be sustainable (Morelli, 2011). Of the three pillars, environmental sustainability is regarded as the most important one and if it is not promoted, the other pillars cannot be made strong because they are dependent on the greater system of the environment in which they exist (Haq, 2011). Whether one considers sustainability to exist as a
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Although urban agriculture is not restricted to the urban poor it is the most economically vulnerable residents who will engage in urban farming (Mbiba, 1994 in Massey 1999). Apart from the social and economic benefits of urban agriculture, many environmental benefits can be realized in the long run like controlled soil erosion and preservation of soil fertility (Milburn, 2009). What municipalities and local governments need is to carefully include agriculture in urban planning, and support it as another way of increasing participation and sustainability projects in cities(Mbiba, 1994 in Massey 1999) . City authorities also need to work harder in educating urban residents against the general distaste towards rural land uses like farming in urban areas (Milburn, 2009). Redefinition of what it means to be urban that include recognition of city natures may help to produce more sustainable forms of urban living and building better cities to live in (Massey,…show more content…
Although there is no consensus among scholars on how to measure green space access, most studies have used Geographical Information systems (GIS) to measure this accessibility (Wolch et al., 2014). Metrics of this measurement included presence vs absence of a park or recreational area near a home and density of facilities (Sister et al., 2010; Wolch et al., 2014). The challenge of this method is that GIS cannot describe the function of a green space which may discourage use of green space in a particular
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