This graph shows the CO2 concentration in the atmosphere (at Mauna Loa observatory) overlaying a temperature graph of the global temperature anomaly over the same period of time.
It shows a total of a 45 ppm increase in CO2 over eleven years...and a temperature curve which trends upward for half that period and then trends downward.
I leave the conclusion to you.
* * *
Sources:
Here's where I got that graph.
Ace linked to it, which is where I learned of this in the first place.