**1.3 Mitigation systems**

Radon mitigation system is a practical approach to minimize high levels of radon emanation in identified areas through determining radon entry points and the nature of the foundation of buildings. In mines, to deal with radon entry points, radon sealants and bulkheads are used to block or control radon emanation from rocks, while in dusty atmospheres of the mine dust, controls such as air filters are of use [13] . In communities closer to radon-prone areas, natural ventilation system is important followed by radon suction system to drive radon away from the house or building.
