Radon Gas is a colourless, odourless radioactive gas that is naturally present in the soil, it comes from the breakdown of radioactive uranium. Radon is present in 100% of homes, how much is in your home? The long term health effects of Radon exposure is lung cancer. Radon Gas is the #1 cause of lung cancer in non smokers. Testing your home is easy and inexpensive. Scroll down to find out more.