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2. Radon mitigation - Wikipedia

   en.wikipedia.org/wiki/Radon_mitigation

   High radon levels in a Minnesota (USA) basement with a passive under slab vent pipe system can be seen in the left half of the graph. After installation of a radon fan (ASD), a permanent reduction in radon levels to approximately 0.6 pCi/L can be seen in the right half of the graph. The most common approach is active soil depressurization (ASD).

3. Health effects of radon - Wikipedia

   en.wikipedia.org/wiki/Health_effects_of_radon

   The EPA recommends that an initial short-term test be performed in a closed building. An initial short-term test of 2 to 90 days allows residents to be informed quickly in case a home contains high levels of radon. Long-term tests provide a better estimate of the average annual radon level. [108]

4. List of U.S. states by median home price - Wikipedia

   en.wikipedia.org/wiki/List_of_U.S._states_by...

   Home prices by county (2021) <$100,000 $200,000 $300,000 $400,000 $500,000 $600,000 $700,000+ Cost of housing by State. This article contains a list of U.S. states and the District of Columbia by median home price, according to data from Zillow.

5. Radium and radon in the environment - Wikipedia

   en.wikipedia.org/wiki/Radium_and_radon_in_the...

   The highest levels of radon in rainwater occur during thunderstorms, and it is hypothesized that radon is concentrated in thunderstorms because it forms some positive ions during thunderstorms. [12] Estimates of the age of raindrops have been obtained from measuring the isotopic abundance of radon's short-lived decay progeny in rainwater. [13]

6. Indoor air quality - Wikipedia

   en.wikipedia.org/wiki/Indoor_air_quality

   Radon is measured in picocuries per liter of air (pCi/L) or becquerel per cubic meter (Bq m-3). Both are measurements of radioactivity. The World Health Organization (WHO) sets the ideal indoor radon levels at 100 Bq/m-3. [97] In the United States, it is recommend to fix homes with radon levels at or above 4 pCi/L.

7. U.S. Elections - Latest News and Updates on ... - AOL

   www.aol.com/politics/elections

   Get the latest updates on the U.S. Elections. Stay informed with fast facts, candidate updates, and key takeaways on the issues, all in one place.