Because of its half-life of 5730 years, the carbon-14 due to nuclear tests will vanish extremely slowly ... and may disrupt the future radiocarbon-14 dating performed by our descendents. One estimates to 0.22 EBq (1 etabecquerel = 1 billion of billions of becquerels) the amount of Carbon-14 produced as a result of atmospheric testing. This amount compared to the 11.5 EBq accumulated as a result of cosmic radiation, corresponds to an excess of about 2%. Most of this carbon ends up in the ocean, 1.6% going in the troposphere. Limited attention is paid to tritium, which have a very low radiotoxicity and vanishes with an half-life of 12 years.