• Question: What is the biggest source of radiation in an urban environment?

    Asked by Tomiris Tatisheva to Samantha, Peter on 23 Nov 2020.
    • Photo: Samantha Watson

      Samantha Watson answered on 23 Nov 2020:

      The biggest source of radiation in normal life is from radon gas in the ground. This is a natural thing, but if it comes up from the ground and gets trapped in a building can cause radiation exposure. About 50% of the average dose in the UK comes from radon gas. It is possible to monitor a building to see if it is a problem, and to put measures in place to help reduce the level of radon gas if it is a problem though.