On the right side of both the production and labor screens you see icons representing grain and meat. Everyone in your population eats one grain or one meat every turn. Your population consists of each industrial worker, each unit in the army, and each naval unit.
In the lower left portion of the labor screen you see three boxes labeled population. The total population in these boxes equals the total amount of meat and grain eaten each turn. This food arrives from the farms and ranches you have been connecting on the main map.
