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It is often the single largest contributor to an individual's background radiation dose, and is the most variable from location to location. Radon gas from natural sources can accumulate in buildings, especially in confined areas such as attics and basements. It can also be found in some spring waters and hot springs. [2]
Radium, like radon, is radioactive and is found in small quantities in nature and is hazardous to life if radiation exceeds 20-50 mSv/year. Radium is a decay product of uranium and thorium . [ 2 ] Radium may also be released into the environment by human activity: for example, in improperly discarded products painted with radioluminescent paint.
Radon is found in some petroleum. Because radon has a similar pressure and temperature curve to propane, and oil refineries separate petrochemicals based on their boiling points, the piping carrying freshly separated propane in oil refineries can become contaminated because of decaying radon and its products. [86]
The EPA estimates that if 1,000 people who do not smoke are exposed to 4 pCi/L of radon over a lifetime of 70 years, about seven could develop lung cancer as a result.
New data shows the average U.S. citizen breathed in more wildfire smoke this year than any of the last 17. Know home fireplace regulations.
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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).
You can use wood-burning fireplaces, stoves, inserts and pellet stoves on any day when fine particulate pollution (PM2.5) isn’t forecast to be high.
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