The American Lung Association position regarding Radon – It’s a killer. The killer is the colorless, tasteless and odorless gas, radon, which causes an estimated 20,000 deaths from lung cancer each year. Radon is emitted from the ground and enters a home through cracks in walls, basements, floors and other openings. Only smoking causes more lung cancer. That invisible threat is why the American Lung Association applauded the recent announcement by U.S. Department of Housing and Urban Development (HUD) that it is taking steps to protect families from exposure to this dangerous culprit.