Here's a potential use for unwanted or damaged compact disks: Set them aside as home radon detectors.
Radon is a radioactive gas that can accumulate in homes as it seeps from the soil or from building material, such as stone. Some studies have suggested that the alpha particles ejected when radon decays may rank second only to tobacco smoke as a source of lung cancer (SN: 8/15/87, p. 105).
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