Wednesday, December 12, 2007
Correlation and Causation and Global Warming
I listened to the Great Global warming Swindle movie today and was intrigued by one point especially. The narrator noted that there was agreement with Al Gore concerning a correlation between CO2 and global warming. Where there is increased CO2, there has been increased global temperatures. Where they part ways with Gore et al is that they don't confuse correlation with causation. Rather, they have concluded that, if anything, global warming causes an increase in CO2 rather than the other way around. They offered evidence to that effect, suggesting that the global warming comes first, followed hundreds of years later by increases in CO2. I am no scientist so I will not weigh in on the accuracy of that claim, but it is an intriguing point. It is a common mistake to confuse correlation with causation. Perhaps Al Gore has done so.