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</html><thumbnail_url>https://www.constructionspecifier.com/wp-content/uploads/2017/03/bigstock-Radon-Symbol-Rn-Element-Of-138283076.jpg</thumbnail_url><thumbnail_width>900</thumbnail_width><thumbnail_height>673</thumbnail_height><description>Radon is a problem found throughout the country, especially in Colorado and northern states bordering Canada. Levels tend to fluctuate based on weather and ventilation, so great variances can exist between regions, structures, or even rooms within the same building.</description></oembed>
