Radon is a naturally occurring radioactive gas produced in the grund through the normal decay of uranium and radium. In the USA and UK radon causes more deaths annually than falling, fires and drowning. Radon is a gas that we can‘t see, smell or taste. Therefore, a special test kit is required to detect it.
These are inexpensive and easy to order online. Radon comes from the rocks and soil found everywhere in the UK. The radon level in the air we breathe outside is very low. but can be higher inside buildings. Radon is responsible for causing an estimated 1,100 deaths from lung cancer each year m the UK.
photo credit: draxe.com, visualsonline.cancer.gov/details.cfm?imageid=2344, http://energy.lbl.gov/ie/high-radon/frac4.htm