2. 1 million years ago, North America was covered with "ice age" glacier down to Indiana, while Greenland was entirely green. Hence, during the past million years, Greenland froze while North America thawed, all at the same time on the same planet with the same atmosphere with the same amount of Co2 in the atmosphere. So what did Co2 have to do with either event?
3. If you have two and only two measures of the same thing, and both measures return highly correlated data, should you accept the data, or fudge both one way with uncorrelated "corrections" to support your cause?