فلذلك كان العمران في الإقليم الأوّل والثّاني قليلا وفي الثّالث والرّابع والخامس متوسّطا لاعتدال الحرّ بنقصان الضّوء وفي السّادس والسّابع كثيرا لنقصان الحرّ
Therefore, there is little civilization in the first and second zones. There is a medium degree of civilization in the third, fourth, and fifth zones, because the heat there is temperate owing to the decreased amount of light. There is a great deal of civilization in the sixth and seventh zones because of the decreased amount of heat there