However the chart in your last link shows the peak of that concentration seems to be ~120 million years ago, with a pretty steep decline in geologic terms afterwards, ~55 million years before the K-T extinction.
Good catch! It seems that although CO2 was much higher than today, it was mostly in decline during the Troodon times. Doesn’t look like an effect of a tech civilization.
However the chart in your last link shows the peak of that concentration seems to be ~120 million years ago, with a pretty steep decline in geologic terms afterwards, ~55 million years before the K-T extinction.
Good catch! It seems that although CO2 was much higher than today, it was mostly in decline during the Troodon times. Doesn’t look like an effect of a tech civilization.