Radon is a colourless, odourless, radioactive gas that occurs naturally in the environment. It comes from the natural breakdown of uranium in soils and rocks. The Maclean's magazine reports 2,000 Canadian die from radon exposure in their home. (click on the photo)
The Health Canada plans to spend almost $1 million testing 18,000 randomly chosen homes to make a "radon potential map". In 2007, we had protocols done by the BC Centre for Disease Control. A BC radon map was made (see map).
Please don't panic, average only 2.5% households contain "unsafe" levels (more than 200 becquerels per cubic metre). The Richmond houses are far away from the affected BC interior area. No smoking! and keep good ventilation in your home.
聯邦衛生局將動用一百萬元為一萬八千家庭測試氡氣含量，並會繪畫氡氣分佈圖。2007年卑斯省已完成試驗製成分佈圖(見附圖)。從圖中所見，列治文市並不在 200 becquerels per cubic metre 高危範圍內，請勿吸菸！並保持室內空氣清新即可確保健康。
Radon: Truth vs. myth
Radon: Risk and Reality
BC Centre for Disease Control (BCCDC)
Canadian Centre for Occupational Health and Safety
US Environmental Protection Agency
WHO International Radon Project
WHO Handbook on Indoor Radon (September 2009)
世卫组织 - 氡与癌症
The Radon Information Center
January - National Radon Action Month 氡氣行動月