Quote Originally Posted by Plug Drugs View Post
Doesn't that only chart back <100,000 years?

Also, do you think the readings could be wrong or swayed by agenda? Like, could our means of measuring CO2 levels historically be off, such that modern day CO2 levels seem to be exploding off the chart compared to the CO2 level increases of the past, when really its just because our measurements are off?
400,000 years
the ice cores contain air, the air contains air, samples of both are analyzed the same way so that any scientific error will be proportionally rather than relative