Carbon dating change
Now, plants constantly breathe in fresh carbon (in the form of carbon dioxide) from the atmosphere, so the ratio of carbon-14 to carbon-13 in their cells matches the ratio in the atmosphere.The same goes for animals that eat plants, and animals that eat animals, and on up the food chain. In particular, they stop taking in new carbon-14, and what's left over at the time of death is left to decay.So, essentially isotopes of the same element are chemically identical, but of different masses. Because it’s not affected by physical (temperature, pressure) or chemical (water content etc.) phenomena, this radioactive decay can be used as a “clock”. Radiocarbon dating was the first method that allowed archaeologists to place what they found in chronological order without the need for written records or coins.
Living organisms are constantly incorporating this C-14 into their bodies along with other carbon isotopes.
Rising CO2 levels in the atmosphere are, however, artificially aging the atmosphere and this might drastically interfere with the accuracy of radiocarbon dating.
According to a new paper published by a team at the Imperial College London, “by 2050 a new T-shirt would have the same radiocarbon date as a robe worn by William the Conqueror a thousand years earlier.”Radiocarbon dating works by comparing the three different isotopes of carbon, where an isotope is an element with the same number of protons, but different number of neutrons.
There are many consequences of burning fossil fuels, though usually the focus is on climate: oceans will rise; megadroughts will attack; growing seasons will shorten.
Now, there's another negative side effect to add to the list.