Image: US homes over recommended radon levels
US_homes_over_recommended_radon_levels.gif (656 × 453 pixels, file size: 36 KB, MIME type: image/gif)
Description: Predicted fraction of homes exceeding the EPA's recommended action level of 4 pCi/L
Title: US homes over recommended radon levels
Credit: http://energy.lbl.gov/ie/high-radon/frac4.htm
Author: US EPA
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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