Radon, essential element in air quality considerations. Le radon, element essentiel de la qualite de l'air.

Discusses levels of radon commonly found, the limits fixed by Sweden for buildings, and the health effects of these levels. The three main sources of radon are domestic water, building materials and the ground, with the ground being the most important element. Radon values for different soils in Sweden are given as illustration. COSTIC is planning to study the most susceptible zones of France, and to follow this with recommendations, including minimumair change rates.