Passive Defense Consideration Urban Environmental Technologys of Settlments (Tehran 15 th District Case Studding)

Nowadays cities benefit from two geographical (natural environments, social and economical) and artificial(man-made environments, and architecture)symbols. Mankind has always been trying to change these two symbols for the sake of his daily activities or earning his life and establishing a dwelling both as an interest and as a shelter. During this process green areas, jungles, and gardens have been changed in to skyscrapers and buildings. Replaced for attractive views of nature. Today’s citizens have a sad feeling while they see that they have fallen far from the beauties and quietness of nature.To solve this problem, industrialists have developed the green roof technology. Urban planners and architects use it as ‘back to nature’ process.Green roof is a method to convert the rough, dry, and coldparts of the city in to green spots.Besides green roofs can create micro- climatic zones which reduce pollution and improve the living conditions of the citizens.In this study, the method of "descriptive content analysis" is used, in order to collect information from the Internet and library studies and field methods, such as questionnaires, interviews, and find help, due to the nature of research that is of the type of application, as well as with regard to the issue of research in order to better communication with experts, consider using khi Do(X2)Technique. Application of the results of the use of passive defense operating considerations in green spaces in the city take advantage of herbal elements in Secretion, camouflage and deception plans; the use of green space in designing of urban settlement; To ensachieve these results and decrease the vulnerability and increase the sustainability of the city to achieve multi purposes of passive defense.