Definitions for "Radon gas"
Radon is a colorless and odorless radioactive gas that may be present in groundwater sources that come into contact with uranium-rich minerals.
radon is a radioactive gas that is colourless, odourless and tasteless. It is formed by the natural breakdown of uranium in soil, rock and water.
A naturally occuring radioactive gas. Radon is given off by the Earth. The amount of it around depends on where you live. Areas with a lot of granite in the ground tend to have higher than average levels of radon. In the UK these are Derbyshire, Devon, Cornwall, Somerset and Northamptonshire. Radon is one of the causes of lung cancer and may contribute to causing other cancers as well.