Guam - Those looking to test their homes for radon can do so for free as part of the U.S. Environmental Protection Agency's National Radon Action Month. Radon is a naturally occurring, colorless, odorless, inert radioactive gas that is the leading cause of lung cancer deaths among non-smokers in the U.S.

According to Guam EPA surveys, 27% of Guam homes have higher levels than recommended by the USEPA. Free radon test packets can be filled out at the Guam EPA in Tiyan from 8am to 5pm or downloaded at http://epa.guam.gov.