In a study of 61 homes in Perry, students from the Promontory School of Expeditionary Learning discovered that 75% of them have radon levels above the mitigation threshold recommended by the World Health Organization. The study’s findings, part of an extensive project on radon by the school’s eighth graders, were presented at the state capitol last week. Radon, an invisible, odorless, radioactive gas that results from the decay of the uranium and radium in the soil and rocks—Utah has ample uranium— is the second leading cause of lung cancer, and the leading cause among non-smokers, according to the American Cancer...

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