the danger of radon gas in our homes - concept

222 aerated air antiradon aqueous aspirator barrier bedrock below breathing building comfort concept cracks crawl danger dangerous decay deterioration earth filtering floor flooring foundation gap gas glass groundwater home homes house humidity illustration inhaling intake lens magnifier magnify magnifying membrane natural our paving pipe pipes poisonous polluted pollution protection radiation radioactive radioactivity radium radon radonstop risk safe section security shower soil space steam under uranium vapor vent ventilated ventilation wall wellbeing wellness