January is National Radon Action Month, and University of Nevada Cooperative Extension’s Radon Education Program is offering free short-term radon test kits to Nevadans through Feb. 28. The free test kits will be available at Cooperative Extension offices and partnering locations, as well as at presentations, statewide. Radon is a naturally occurring, radioactive gas that is colorless, odorless and tasteless. It comes from the ground and can accumulate in homes, raising the risk of lung cancer. In Nevada, one in four homes tested show radon concentrations at or above the EPA action level.