The mesozoic era would have been the period where dinosaurs (allegedly) migrated to the same geographical locations (Texas, the Middle East, Kazakstan, etc.) to die and turn into oil, thus locking up carbon deep underground. Yet according to the chart above, CO2 levels were substantially higher at the end of that era than they are now.
Also, conspicuously missing from any data representation of climate change data is the source of global warming itself - the sun, its cyclical nature, and its relation to the everchanging elliptical orbit of the earth. In other words, radiation energy from the sun is not constant. Yet in any model, it always gets treated as if it is.