What happens to radon when it enters the environment?
• Radon gas in the rocks and soil can move to air, groundwater, and surface water. • Radon has a radioactive half-life of about 4 days; this means that one-half of a given amount of radon will decay to other products every 4 days. • Decay products of radon are solids that can be trapped inside the earth or, if in the air when radon decays, can attach to dust and other particles and move with the air.