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[[File:ICRPGuide.JPG|150px|thumb|right|link=Guide_to_Radon_demo|Take me back to the ICRP's [[Guide_to_Radon_demo|Guide to Radon]]!]]
Introduction
==Section 1What is Radon?==
<br/>
<span style= "font-size:115%;"> '''Radon (chemical symbol: Rn) is a natural part of the environment. It is a radioactive gas that comes mainly from soil and rock, and is a normal part of the air we breathe.''' </span>
Radon can also come from water and building materials, but the amount is usually very small.Radon cannot be seen, and has no smell. The only way to know how much radon is in the air is to [[Measuring and Reducing Radon Levels in your Home|measure it]]. Radon makes up the largest part of natural [[Sources of Radiation Exposure]]. There is usually less radon outdoors than indoors, since radon can concentrate in enclosed spaces. Exposure to radon outdoors is generally not an issue, so we normally focus on [[Exposure to Radon at Home]] and in indoor workplaces. Radon is the second leading cause of lung cancer after smoking. Exposure to higher levels of radon for a long time can increase your [[Risk of Exposure to Radon|risk of lung cancer]]. Information on measuring and, if necessary, reducing radon levels, is available for [[Measuring and Reducing Radon Levels in your Home|homeowners]], [[Radon Recommendations for Workplaces|businesses]], and [[Radon Recommendations for Authorities|government authorities]]. '''[[#Top|Back to Top]]''' ==Risk of Exposure to Radon=SubSection=<br/><span style="font-size:115%;"> '''There is strong evidence that exposure to radon can cause lung cancer. Radon exposure is the second leading cause of lung cancer after smoking.''' </span> Smokers are more at risk from radon exposure than non-smokers. A lifetime of exposure to radon at 100 [[Radon: Units of Measure|Bq/m<sup>3</sup>]] increases the risk of lung cancer by 0.1% for non-smokers, and 2% for smokers. More precisely, for an average radon concentration of 100 [[Radon: Units of Measure|Bq/m<sup>3</sup>]], the lifetime risk of lung cancer for non-smokers is 0.5% (compared with a risk of 0.4% in the absence of radon). For lifelong smokers, the risk is 12% (compared with a risk of 10% in the absence of radon). ====From the WHO Factsheet on Indoor Radon==== <blockquote> "Radon is the most important cause of lung cancer after smoking. It is estimated that radon causes between 3–14% of all lung cancers in a country, depending on the average radon level and the smoking prevalence in a country.” </blockquote> <blockquote> “… the risk of lung cancer increases … with increasing radon exposure.” </blockquote> {||style="border: 1px solid #4682B4;" | The United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) is the leading international body on radiation levels and effects. Visit the [http://www.unscear.org/ UNSCEAR website] or read the UNEP report on [https://wedocs.unep.org/handle/20.500.11822/7790;jsessionid=E71B4A7CFB4A79AB88CAC19654B2CBF7 "Radiation Effects and Sources"] based on UNSCEAR work to learn more|}
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==Section 2Units of Measure==
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===Radon Measurements===
A becquerel is a measure of radioactivity. One becquerel (Bq) is equal to one radioactive decay per second.
Radon concentrations in air are usually measured in becquerels per cubic meter (Bq/m<sup>3</sup>). That’s the amount of radon (becquerels) in a volume of air (cubic metre).
Worldwide, the average radon concentration in outdoor air is around 10 Bq/m<sup>3</sup>.
Some countries still use older units of picocuries per litre (pCi/L). 10 Bq/m<sup>3</sup> = 0.27 pCi/L.
===Potential Alpha Energy Concentration===
In some circumstances, it’s more important to measure the level of radon progeny instead of the radon itself, specifically the Potential Alpha Energy Concentration (PAEC). This is the sum of the alpha particle decay energy of all the short-lived progeny of radon in a volume of air. The SI unit is joule per cubic metre (J m<sup>-3</sup>).
Historically, PAEC was measured in units of Working Levels (WL).
1 WL= 2.08 x 10<sup>-5</sup>J m<sup>-3</sup>
'''[[#Top|Back to Top]]'''
[[File:ICRPGuide.JPG|50px|link=Guide_to_Radon_demo]]Take me back to the ICRP's [[Guide_to_Radon_demo|Guide to Radon]]!
If you are looking for something more extensive look no further below are a collection of related links and articles that can provide more information on this topic!
===Risk of Exposure to Radon===
{| class="wikitable"
|-
| DescriptionLung Cancer Risk from Radon and Progeny and Statement on Radon| URL[[ICRP Publication 115]]|-| WHO Factsheet on Indoor Radon| [http://www.who.int/mediacentre/factsheets/fs291/en/ www.who.int]|-| Expert Summary of ICRP Recommendations on Radon| [[Media:ICRPRadonSummary.pdf|ICRP Radon Summary]]|-| Radiological Protection against Radon Exposure| [[ICRP Publication 126]]|-| WHO Handbook on Indoor Radon| [http://apps.who.int/iris/bitstream/10665/44149/1/9789241547673_eng.pdf Handbook]
|-
| DescriptionUNEP report on Radiation Effects and Sources| URL[https://wedocs.unep.org/handle/20.500.11822/7790;jsessionid=E71B4A7CFB4A79AB88CAC19654B2CBF7 https://wedocs.unep.org/]
|}
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