Abstract
The problem of informal areas is the most significant urban challenge facing third world countries. Most of the urban population has become informal areas dwellers. These areas consume many resources and suffer from bad conditions. Therefore the need arose to transform them into sustainable societies in order to save resources and improve their quality of life. This paper discusses the sustainability as means of achieving quality, efficiency and improvements in informal areas using the three pillars of sustainability: social, economic and environmental. It also aims at carrying out a comparative analysis of case studies for sustainable upgrading of informal areas in Brazil and India to observe the impact on their dwellers' life after upgrading. Analysis is examined on three levels: economic, social and environmental. Moreover, the comparison and evaluation of results ends with suggestions to be applied on Egyptian informal areas in order to achieve more efficient and sustainable upgraded areas.
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