Flannery, page-51

Correlation is not causation.
CO2 makes a small contribution but natural variation(the sun) is likely to be the main driver of this moderate and very welcome warming.
200 years ago, we were at the end of a very cold period, 4C below the average of the last 10,000 years.
An increase in CO2 always follows warming, as the oceans warm CO2 is released.
The increase in CO2 has been from 280ppm to 430ppm, the anthropogenic portion of this increase is 3%.