The key questions then are: Has the atmospheric ratio of carbon-14 to carbon-12 changed in the past, and if so, why and how much?The assumption usually made, but rarely acknowledged, is that the ratio of carbon-14 to carbon-12 in the atmosphere before the industrial revolution has always been the sameabout one in a trillion.Plants take in carbon dioxide, incorporating in their tissues both carbon-14 (unstable) and normal carbon-12 (stable) in the same proportion as they occur in the atmosphere .Carbon-14 then moves up the various food chains to enter animal tissueagain, in about the same ratio carbon-14 has with carbon-12 in the atmosphere.Until recent years, scientists who believe in creation haven't had the necessary resources to explore radiometric dating in detail.A 10 gram sample of U-238Now that has changed, and some important discoveries are being made.Afterward, less carbon would be available to enter the atmosphere from decaying vegetation.
Half of the remainder will decay in another 5,730 years, and so on.
As our knowledge continues to grow, what we know continues to be in agreement with Scripture.
Radiocarbon ages less than 3,500 years old are probably accurate.
Therefore, a radiocarbon year would not correspond to an actual year.
As explained in recent measurements show that the ratio of carbon-14 to carbon-12 has been building up in the atmosphere.