Global cities are strategic spatial nodes of the global economy with localized base points for capital accumulation in an era of intensified globalization (Brenner, 1998) . (Sassen, 2005), states that this centralization has taken a new form. The main contributor to this new form is the reorganization of the financial sector and the spatial dispersion of economic activities. This has led to an overall concentration of control and ownership. The dispersion of economic activities has led to the specialization of companies as well as the expansion of central functions. The financial sector is characterized by the proliferation of financial companies, innovations and increased growth. Global cities have shown a dominant socio-economic trend. This includes labor market segmentation, geography of capital flows, social conflicts, expansion of producers and financial services (Brenner, 1998). According to (Sassen, 2005), production activities are dispersed globally. This has led to complex production networks that demand new innovations. In order to facilitate their management, the specialization recommended the grouping of related activities on different sites. This has enabled the coexistence of cities.BackgroundThe growth and expansion of global cities cannot be isolated from public health and social life. Technological progress and economic growth go hand in hand with existing social systems. Global cities have experienced enormous morphological changes within their spatial location. Indeed, people continued to migrate to cities, causing them to grow spatially over time and experience rapid transformation. This gave rise to many challenges. Poor solid waste management, deteriorated urban infrastructure, potholed roads and...... middle of paper ......gle, GK and AN (2008, October). Geriatric health in India: concerns and solutions. Indian Journal of Community Medicine, 33(4), 214-218.KC, SJ, GB, HY, HT, HM et al. (2009). Greenhouse gas emissions from global cities. Environment, Science and Technology, 43(1), 7297-7302. Keil, R. and Ali, H. (2005). SARS and the global city: urbanization and infectious diseases in the era of globalization. Ontario: forthcoming in Progress in Human Geography. Montgomery, J. (1998). Making a city: Urbanity, vitality and urban design. Journal of Urban Design. Flight. 3 n°1.Rahul and Matias. (January 6, 2009). airroots_eirut » Incremental development I Preservation of street layout.htm. Retrieved October 23, 2012 from www.google.com: www.dharavi.org Sassen, S. (2005). Denationalization: territory, authority and rights in the global digital age. Chicago: Piincton University Press.