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Radon Map Reveals 1-in-4 Americans Face Dangerous LevelsThe researchers' map reveals the geographical distribution of high radon levels around the country ... especially near the border between Iowa, Nebraska and South Dakota. Other areas with ...
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Map reveals US hotspots for cancer-causing radioactive gasA new map has revealed ... southern Minnesota and all across Iowa and North Dakota. Scattered locations throughout Montana, Idaho, Wyoming and Colorado also had high radon levels in winter ...
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