The exposure of human beings to ionizing radiation from natural sources is a continuous and unavoidable feature of life on earth. UNSCEAR 2000: source of ionizing radiation
Artificial radioactivity is a fundamental discovery that has made it possible to recreate radionuclides with a short life span. When this exposure is not mastered, it can be dangerous.
In the drilling of gas, the drillers sometimes cross lands containing radioactive ores (uranium, radium). A radioactivity that eventually rises: the drilling waste (sludge, sands).
The tailings of uranium ore processing are stored directly at the mine sites. These mining wastes are very low activity because uranium is one of the least radioactive elements of nature.