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1. INTRODUCTION
There is no universal definition to sustainability but strong sustainability minimizes the possibility of replacing natural resources with artificial things (Pearce, Atkinson et al. 1994, Dresner 2008). This means to utilize the available resources in such a way that current generation obtain their benefits without sacrificing the needs of future generations. This research has analyzed only the social aspect of sustainability that affects the construction projects in Pakistan. Once the importance of sustainability in construction has been understood it would help to find a path towards a common understanding of issue to reach a point from which obtained logically a valid result concerning the relative advantages of different methods to sustainability and to sustainable construction itself (Chong, Kumar et al. (2009).
Sustainable development is simply defined as “development, which meets the needs of the present without compromising the ability of future generations to meet their own needs” (WCED 1987). Sustainable development results to a state of society where living conditions and resources to meet human needs without effecting moral, balance and sustainability of natural ecosystem. Sustainable development can be defined as development that fulfills the needs of current generations without compromising the needs of future generation. However only design considerations and on site management can’t achieve sustainable development (Ding 2008). Sustainable construction is not green or environment friendly only (Gunatilake 2013). The sustainability no longer only considers the environmental aspect, but also considers the economic and social aspects of sustainability (Dempsey, Bramley et al. 2011). The sustainable development is forward-looking. It is a continuous mission for future development of human society. A surly sustainable society is one that make initiatives toward development in sustainable ways (Robin and Poon (2009). Sustainable construction is generally related to the importance of sustainable development in the construction industry. An industry is defined as all who produce, develop, plan, design, build, alter or maintain the built environment and includes building materials manufacturers and suppliers as well as clients and end users (Wilkinson, Sayce et al. 2015). Clients and end users are also the important participants to deliver the sustainable development. Sustainable development is a key for ensuring the better life for present as well as future generations. Mankind uses buildings and structures for their social needs as a shelter, to meet economic needs for investment and to satisfy corporate objectives (Abidin 2009). With the increasing requirements for resource efficiency and climate change adaptation in the construction industry, The contractors needs to implement sustainable practices (Tan, Shen et al. 2011). Sustainable assessment methods for building projects are playing a key role in introducing sustainability values (Kaatz, Root et al. (2006).