Green Roofs

Nowadays cities benefit from two geographical (natural, social, and economical environments) and artificial (man-made environment, 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 into skyscrapers and buildings. Bricks, cement, and metallic plates have 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 a ‘back to nature’ process. Green roof is a method to convert the rough, dry, and cold parts of the city into green spots. Besides green roofs can create micro-climatic zones which reduce pollution and improve the living conditions of the citizens. This process is highly advantageous for cities like Tehran which is located in a 730 sq. km. of land delimited by mountains and deserts. 67.9 percent of the city is occupied by buildings and about thirteen million people live in this city. Green roofs are good means for reducing these problems of Tehran.