The Growth of Urbanization and Environmental Instability: A Case Study in Ahvaz Metropolis

Abstract

Uncontrolled growth of urbanization has been exposed major quantitative and qualitative developments at the beginning of twenty-first century. Current world has been much urbanized and proportion of urban population to total population has been changing and increasing more than before and human modern civilization has been directing to urbanization and this urban growth has served natural resources in its service end. Finally, the result is damaging the ecological system and the unstable environment in cities. Accordingly, we are faced with the questions of how the capacity of cities against environmental problems is caused by urban development and the use of biological resources. These questions are as follows: what is the biological capacity in cities? Does the environment can reconstruct degradation and changing posed by the cities with this level and speed? How much is the amount of urban environmental sustainability to cope with these changes? The role of the city in environmental instability becomes more clear when we know that just about three- quarter of natural resources has been consumed one-fiftieth of the world and the rate of environmental pollution production in cities are three-fourth of the total pollution. Ahvaz metropolis has been chosen as a case of study of the related issue.