Water
Water is the most important resource for a population's Vital Needs.
Water is collected by the Well or the Water Collector.
Water is also used by certain industries like the Potter.
Water is vital to a territory's growth. Lack of water will impose a penalty on Porcos' health, scaling up to -100% if no water is available.
Water is the only distributable resource that does not require a Market stand or a Merchant in order to be distributed.