Nothing like having the perspective of the last 600 million years in relation to climate as opposed to looking at the last 150 years with blinders on.
So using the Vostek ice core data no one here can show/prove a relationship between CO2 and the Earth's temperature.
The Earth's main greenhouse gas is water vapor responsible for 97% of the greenhouse gas effect (the EPA says 95%). But there is no easy way to tax water vapor.
That is not the case with CO2, as there are many ways this can be taxed. As Michael Faraday replied to a MP who asked what good is this knowledge, Mike responded "You may be able to figure out a way to tax it" or something along those lines.
This CO2, AGW thing is just a way to tax people..............so loved by the big government types.