This blog is about my bias # 2 of seven bias blogs.
All the evidence one needs to evaluate the global warming issue is in these two charts. First, we just finished the second twenty year warming period in the 20th Century. It ended in 1997. It could not have been caused by the changes in CO2 because CO2 was steadily rising for a century and a half.
The second chart shows global temperature cycles going back a little bit, 750,000 years. The variations in the earth's orbit around the sun is the cause of global temperature change in this period. We are now in one of the 250,000 year long cycles, otherwise we would have entered an ice age 2,000 years ago.
We are also in a period of mass hysteria about global warming. The hysterical people are expressing a modern version of religious eschatology.