Shiraz
, Shiraz has a population of 1,700,665 the majority of whom are Persian. Most of the population of Shiraz are Muslims. Shiraz also was home to a 20,000-strong Jewish community, although most emigrated to the United States and Israel in the latter half of the 20th century. Along with Tehran and Esfahan, Shiraz is one of the handful of Iranian cities with a sizable Jewish population, and more than one active synagogue. Though officially Muslims, many Shirazis privately practice Zoroastrianism or at least hold it in high regard.
Shiraz
During the Zand dynasty when Shiraz was the capital of Iran, it was a small village limited around the Arg of Karim Khan and naturally there were several villages near it. The north part of old Shiraz (now Qasr al-dasht and Chamran) was completely covered with gardens and green trees that still remain. A number of municipal laws prohibit construction in any of the garden areas. In another view, these gardens are the city's lungs and help to clean the dust, and haze or carbon dioxide that cars produce, by photosynthesis. On the other hand, we see Shiraz as being more likely to have clean air in Iran; this is when it is compared to big cities such as Tehran or Isfahan, and the reason behind it may lie in Shiraz's many gardens.