Straw bale houses are eco-friendly structures made primarily from bales of straw, which are the dried stalks of cereal plants. These bales are stacked to form walls, providing excellent insulation and energy efficiency. The use of straw as a building material is sustainable, as it is a byproduct of agriculture and can be sourced locally. In addition to their environmental benefits, straw bale houses can be designed in various styles and sizes, making them versatile for different climates and preferences. They are often finished with plaster or stucco to protect the straw from moisture and pests, ensuring durability and longevity.