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  1. Radon - Wikipedia

    Radon is a contaminant that affects indoor air quality worldwide. Because radon is denser than air it accumulates in basements and crawlspaces under dwellings.

  2. Radon and Your Health | Radon | CDC

    Feb 16, 2024 · Radon is an odorless and invisible radioactive gas naturally released from rocks, soil, and water. Radon can get trapped inside homes and buildings, and build up in the air. …

  3. Radon | US EPA

    Nov 13, 2025 · Radon is a naturally occurring radioactive gas that can cause lung cancer. You can’t see or smell radon. Testing is the only way to know your level of exposure. Radon can …

  4. Radon Gas: Causes, Exposure, Symptoms & Complications

    Radon is a radioactive substance, which means it emits radiation (a type of energy). Radiation can damage your cells, leading to cancer. Experts estimate that radon exposure is the second …

  5. Radon | Definition, Properties, Effects, & Facts | Britannica

    5 days ago · Radon, chemical element, a heavy radioactive gas of Group 18 (noble gases) of the periodic table, generated by the radioactive decay of radium. It is a colorless gas, 7.5 times …

  6. Radon myths busted. What you need to know about the deadly gas

    1 day ago · Radon monitors will soon be available at Columbus libraries. Here's what to know about the deadly gas.

  7. Radon | National Institute of Environmental Health Sciences

    Jun 5, 2025 · Radon is a naturally occurring radioactive gas that is colorless and odorless. Radon comes from the natural decay of uranium or thorium, elements found in rocks, soils, and water.

  8. Radon | Radon | CDC

    Information about how radon gets into your home, how it affects you, and how to reduce it.

  9. Health Risk of Radon - US EPA

    Nov 19, 2025 · Radon is the number one cause of lung cancer among non-smokers, according to EPA estimates. Overall, radon is the second leading cause of lung cancer. Radon is …

  10. What is Radon? Understanding the Invisible Risk in Your Home

    Radon is an invisible, odorless gas that results from the radioactive decay of uranium found naturally in soil, rock, and water. This naturally occurring radioactive gas seeps into our …