Radon is a naturally occurring radioactive gas. It has no smell, colour or taste. Radon is produced from the natural radioactive decay of uranium, which is found in all rocks and soil. Radon can also be found in water.
United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) published in 2020 the report in Sources, Effects and Risks of Ionizing Radiation devoted to the Lung Cancer from Exposure To Radon.