There are four major resources in "Age of Mythology": food, wood, gold, and ; unlike previous games by Ensemble Studios, this game does not include the stone resource. Resources can be used to train units, construct buildings, and research technologies, among other things. Civilian units—namely, the Greek villagers, Norse gatherers and dwarfs, the Egyptian laborers, and fishing boats—are used to gather resources. Hunting animals, gathering berries, harvesting livestock, farming, and fishing are all methods by which food can be gathered. Wood is gathered only by chopping down trees, and gold is gathered from either gold mines or from trade. Players can purchase upgrades that increase the rate of gathering these resources. Favor is acquired in different ways by different cultures: Greek players gain it by having villagers pray at temples; Egyptian players earn it by building monuments; and Norse players receive it by fighting/hunting animals or by possessing heroes. Resources can be exchanged at a player's market, with the exception of favor.