Darmok, thanks a lot for your advice! I really aprecciate it.I like so much playing SC but as i told you i'm quite new and i can't manage well sometimes. I have plenty of questions and queries! I will just mention some of them for today. 1. How someone can create a big city when it must build the industrial zone away from residential to avoid pollution and at the same situation must build the industrial zone near the residential for the good transfer of sims? 2. Why my sims don't stay in my city when i provide them schools,hospitals,police stations....and all the activities that can help them? 3. I have no idea about the taxes. I don't know how to use them. Any other idea or advice would be acceptable and useful for me ......and sorry for my bad english!!