Originally posted by straffo
You're right before 1950.
But after ?
When talking climate change, the record of only 50 years is not statistically significant. Some natural swings in temperature have taken centuries, some studies now indicate that temperatures rose 16 C in only a few decades several times in the past. We are still within the normal fluctuations of this highly chaotic system.
We can have reason to suspect that we are having an effect, but that is all the more sure we can be. The only thing we can be sure of now is that we do not know. We can suspect, but that is not enough for a conviction.