Sorry for the newbie question... i was curious. From what I understood, at the start its always better to remove woods to speed up production. But when you can build lumber mills, is it still worth to just remove forests or you guys actually build them? Right now i use lumber mills on cities with a lot of surplus of food. Also I'm wondering, right now i try to keep surplus of food to 10/15 top when cities are above 13-15 levels, what do you guys suggest to do? Is there a certain rule to balance to decide how much surplus of food to have? And is it worth to, lets say in a city with a lot of food surplus, to remove a farm to build trees and then lumber mill? That takes 3 builds so im wondering if its actually worth. thanks!