The Urban Tree is one of the five Progressive Era decorations and can be build after researching Traffic Lanes. When the Urban Tree is polished, its output of happiness is doubled for 12 hours. Decoration does not need a road connection.
+61 per tile.
Your decoration can be polished to double the happiness provided to +122 for 12 hours.
- The efficiency is calculated by the happiness it provides divided by the number of squares the building takes up in size.