Governor Terry Branstad is joining the National Environmental Protection Agency to declare January Radon Action Month in Iowa. Radon is an invisible and orderless gas that can enter the home from underground sources. According to the National Cancer Institute, radon is the second leading cause of lung cancer in the United States. Kits to test for radon in your home are available at Stravers Tru-Value in Pella, and cost $12, however, once you complete the test and send in the sample there is an additional fee of $30 for the lab work.