These coastal wetlands and flooded interior lands produce only a small quantity of food. Like Jungles, however, they can be converted into Grasslands or Forest.
Swamps produce 1 food. Oil can be found in swamps which generate an extra 4 resource.
It costs 2 Movement Points to travel over a Swamp region.
Excessive pollution in the world can cause coastal squares to become swamp.
Swamps offer a +50% defense bonus.