January is National Radon Action Month: a time to learn how to protect yourself from exposure. Radon is a radioactive, odorless gas that comes from trace amounts of natural uranium in the ground. Radon seeps through cracks and openings in the basement and foundation of homes. Breathing indoor air with high levels of radon can lead to lung cancer. Five to 10 percent of Wisconsin homes have elevated radon levels on the main floor, but systems can be installed to reduce radon levels. Testing for radon is easy and inexpensive. The Kewaunee County Health Department sells short-term test kits for $8, which includes analysis. To obtain one, go to the Kewaunee County Health Department, 810 Lincoln St. in Kewaunee. Call 920.388.7160 if you have questions.