Earth + Water = Mud
Air + Air = Pressure
Earth + Fire = Lava
Earth + Water = Mud
Mud + Plant = Swamp
Water + Water = Puddle
Puddle + Water = Pond
Pond + Water = Lake
Lake + Water = Sea
Sea + Water = Primordial Soup
Earth + Water = Mud
Mud + Fire = Clay
Clay + Life = Human
Plant + Plant = Tree
Grass + Plant = Tree
Seed + Time = Tree