here as the capital more than 200 years ago, 230-40 years ago, it was the right choice, that is , the prab region has the alborz heights behind it due to security barriers, the center of which is the axis of the north, south, east and west. choose an area that has high environmental capacity to choose the path. the next slide shows the years from 1935 to 1990 , if you look carefully, the parts marked with color. done i want you to see that tehran had a population of about 1,561,000 people in 2015, and now it has a population of about 8,600,670,000 people, and these are the censuses of every 10 years of the country. the population growth rate in tehran in 2015 was 9.5%. it was one and fourteen percent, which means about 7 in this case. during the decade of tehran, the growth rate has been decreasing, but instead , the urban area of ​​tehran has increased from 10% to 194. it means that as the population of the center of the metropolis has decreased, the surrounding cities have become heavily populated. now , the reason why this is happened. we slide next, rome, if friends show us , we have a