HARRISBURG - Looking for a thoughtful gift that’s small, doesn’t cost much and saves lives? Give a radon test kit this holiday season and help jumpstart January as national Radon Action Month. Radon is the second-leading cause of lung cancer in the United States, causing an estimated 22,000 deaths a year, said Environmental Protection Secretary Kathleen A. McGinty. High levels of radon have been found in homes throughout Pennsylvania. Because radon is a colorless, odorless gas that occurs naturally in soil and rocks through the breakdown of uranium, testing is the only way to know the radon level in a home. Radon test kits weigh only a few ounces and cost about $25 and are available at many larger stores, including home improvement, outdoor supply, lawn and garden, and hardware stores.