Outdoor seating, such as benches, patios, and pavements, can significantly impact underground gas migration by altering soil structure and permeability. When heavy seating structures are installed, they compress the soil, reducing pore spaces and hindering the natural movement of gases like methane or radon. Conversely, permeable seating materials or elevated designs may allow gases to disperse more freely. Additionally, human activity around seating areas can further disturb soil layers, accelerating or redirecting gas flow. Understanding these dynamics is crucial for urban planning and environmental safety, as improper seating placement may lead to gas accumulation or unintended exposure risks. Studies suggest evaluating soil composition and gas behavior before installing outdoor seating to mitigate potential hazards.