Radon levels in a home are influenced by which of the following factors?

Radon levels in a home are significantly influenced by the geology of the area. Radon is a naturally occurring radioactive gas that originates from the breakdown of uranium in soil and rock. Certain geological formations and soil types have higher concentrations of uranium, which can lead to elevated radon levels in homes situated on or near these sources. The movement of radon gas through the ground can also vary based on the structure of the geology, including factors such as rock porosity and soil permeability, which directly impact how easily radon can seep into buildings.

Other factors, while potentially related to radon levels, do not have as direct a connection. For instance, the type of insulation used, the age of the house, and the size of windows may affect the overall energy efficiency and ventilation of the home but do not fundamentally determine the presence of radon gas. Understanding the influence of geology is crucial for effective radon risk assessment and mitigation strategies, especially in areas known for high radon potential.