I think it’s clear that there is a causal relationship between CO2 levels and temperatures. I don’t think there is a reasonable way to doubt that, just look at Venus for goodness sakes.
The question really is: does our contribution to the total CO2 amount in the atmosphere have a significant impact on the climate?
One factor the environmentalists seem to neglect is the very history they point to in an attempt to bolster their theory. In the article above and the graph you have provided, one can clearly see a natural trend towards rises and falls in CO2 amounts throughout recent geologic history.
A truly reasonable scientist would look at these data and conclude, if anything, we may indeed be in a warming trend but this trend is probably due to some as of yet unidentified factor that has clearly operated in the past, and had nothing to do with humanity.
Let’s examine your graph again. The period between the global increase in temperatures seems to be rather regular, with a period varying between 10 and 20,000 years.
Armed with this information, and the fact the period observed occured at least 4 other times with this same frequency, and the last spike occured about 12,000 years ago, if anything we are left with the distinct possibility (if not probability although admittedly statistical analysis cannot be done given such a small sample size) we are headed towards a warming trend, but not one caused by man’s influence rather one perfectly natural for this geologic epoch.
The truly vital and critical question to ask and answer is: is our CO2 output a significant portion of the total CO2 in the atmosphere? I have never seen this question addressed directly, in a rigorous way, and therefore I suspect the truly scientific and mathematic answer is “no”. I suspect this because it’s never discussed, this specific mechanism of man’s contribution and it’s effect on the environment, and the fact (if indeed it is a fact which I again suspect it is) that our contribution is negligible doesn’t fit too well with the agenda. The agenda being of course population control via the state.
Because “everyone” (everyone by implication who is smart) knows: humans=”bad”.