What plentiful resource was used by the Sumerians to build their cities?

The Sumerians primarily used clay as a plentiful resource to build their cities. They molded clay into bricks, which were then dried in the sun or baked in kilns to create sturdy building materials. This resource was abundant in their region, allowing them to construct impressive structures, including temples and ziggurats, that showcased their architectural skills. Additionally, clay tablets were used for writing, further emphasizing its significance in Sumerian culture.