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Improved radon gas mapping finds nearly 25% of Americans living in highest risk areasEfforts to map radon levels to identify where communities ... of Colorado and a large swath of territory running down from Canada into Wisconsin, parts of Illinois, parts of Iowa, and portions ...
(FYI: The recommended guideline for radon in homes is 200 becquerels per cubic meter — anything above this level should be reduced, according to the Government of Canada.) Luckily, you can easily ...
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