Spokane has rado testing and correction facilities available. This is a colorless, odorless and tasteless gas. It is ubiquitous in the environment due to the natural breakdown of uranium in soil, rock, and water. When trapped inside buildings, it can rise to harmful levels (Radon is known to get trapped in lungs and cause lung cancer, as it is a mutagen). It can also cause stomach cancer, liver cancer, asthma, allergies and other illnesses. Testing for radon should therefore be an annual exercise to be on the safer side. Radon detection kits, radon correction (mitigation) systems, air purifiers and other supplies are available for sale. Professional inspections may also be available in Spokane.