@magibeg. Just because there is a similar looking graph does not mean that one thing caused the other. There is a VERY good reason for believing the reverse - that the rise in temperatures has contributed to the rise in CO2 in the atmosphere. Yes, our burning of fossil fuels has also affected the rise in CO2 levels, there is no question there.I'm not saying that the activities of man are not affecting the climate. I'm sure that they are. I'm simply pointing out that it is a very complex system. There ARE factors other than CO2. We have gone into and come out of ice ages many times in the last couple of million years. Man has been witness to many of these events. The temperature swing of an ice age is 10 to 12 degrees. Compare that to the less than one degree of change that we've been witness to in the last 500 years.If it's all about CO2, answer me this... how did we come out of any one of these ice ages? How does the Earth cool, then warm, by 10 degrees without the devastating effects of man on the environment? Then ask yourself why our sudden and catastrophic effect on the CO2 of the planet has not caused warming in four out of the last seven decades? (hint: we cooled for 30 years, then warmed for 30 years, then cooled for ten.) Also ask why we are today about the same temperature as in 1935 and cooler than some parts of the 13th and 16th centuries?