Enables to raise chickens for eggs and meat. Chickens need to be provided with water and animal feed. To obtain some chickens you can trade with a village on the world map.
Provides permanent disposal of gases such as carbon dioxide by dissolving them in a liquid and injecting them under pressure into the ground. Has no pollution effect. Can be built only on top of a limestone deposit.
Providing food from multiple categories can increase health of your population. A food category can participate in health bonus if it has a health icon next to it. It requires at least two categories to be satisfied before a bonus is provided.
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