The Dome is a special improvement that increases File:20xCultureBE.png Culture. Modifiers: * +1 File:20xEnergyBE.png Energy from Biospheres * +1 File:20xFoodBE.png Food with 12 points in File:Purity (CivBE).png Purity Notes: * Can be build on coast, ocean, or lake tiles with Rising Tide.