The radon is the dominant factor in human exposure from natural radioactive sources existing in nature.

The main sources of radon are soil, water and construction materials

Inhalation of air containing high levels of radon over a long period may increase the risk of developing lung cancer.

Effects on lung cancer risk include duration, irradiation, age, smoking, and other carcinogens.

The risk of lung cancer can be reduced by measuring the volume activity of radon and taking the necessary action if high levels are recorded.

The highest radiation from radon you get in buildings. Radon is present in all types of buildings: old and new, with and without foundation.

The difference in air pressure inside the building and in the soil around it helps the radon to penetrate through the gaps.

The only way to find out what is the bulk activity of radon in the building and whether you are at risk is measuring it with detectors.

It is necessary to test the building before and after major structural-renovation activities, The radon can be removed from the building by a suitable ventilation system with pipes and openings.