A pile of ice below a big icicle.
Sunshine + Ice
The Icicle of Damocles.
Once Al Gore was a mere vice president, but now he is a Nobel laureate and climate-change prophet. He repeats phrases such as "unified national smart grid" the way he once did "no controlling legal authority" -- and the ridicule has been replaced by worship, even by his political foes.
Cassandra had the power to tell the future, but the curse that nobody would believe her. Gore is cursed with always being wrong about the future but he has the power to make everybody believe his wrong predictions.
The idea behind the technique is that carbon 14 is constantly made in the atmosphere and decays at a known rate. So the ratio of carbon 14 and carbon 12 in living things will be about the same as in air. But things which are dead will slowly loose their carbon 14 and so you can see how long they have been dead from how much carbon 14 is left.
The thought I had was that if the concentration of CO2 varies over time, then either depleted carbon is being added to the system or enriched carbon is being taken out of the system. So, assumptions about the past ratios of 12C/14C could be wrong. Just as an example: If we add carbon to the atmosphere by burning coal, we are adding exclusively 12C since coal is very old and all the 14C has disintegrated.
It turns out that someone has thought of this already: Hans Suess. So, this can be looked at in one or two ways. If nobody had thought of it already then either the idea has no merit (I didn't consider something important) or it is genius. Since it has already been thought of, it does have merit but is unremarkable since others have already come up with the same idea.