There are three types of raw resources in the game:
Food
Wood
Stone
Resources are gathered from the hexes on the map and stored in warehouses on the player mat.
The number of cubes in a warehouse indicates the amount of resources of that type that the player has. Warehouses can store an unlimited number of resources.
Resource cubes 
are unpainted wooden cubes: 8 mm sided corresponds to 1 resource item, while a 10 mm sided corresponds to 5 items.
The player has 5, 4 and 2.