Resources

An arrow will indicate when a resource or type or resource is increasing or decreasing.

Food
Every few minutes villagers will go on a break, gather around the Hearth, and try to each complex food from the Storage. If nothing they like is available, they will eat raw food. If there is no food whatsoever, they will get one stack of the Hunger effect. Each stack is a Resolve penalty, and if the Resolve of a species reaches 0, they will start to leave the settlement.

Even if you grow vegetables on your farms, the amount of food you produce will coom become insufficient for a growing population. The solution is to process raw food and thus multiply it, as most Recipes in the game yield more goods than raw ingredients used in them.

Building materials
All buildings aside from camps and shelters require building materials for construction. All buildings materials are refunded if a building is demolished.