As glaciers all over the world retreat, it has spawned a new branch of Archaeology - Glacial Archaeology. They are finding 4000 year old forests in the Alps along with Roman artifacts dating to around 300 AD in Norway. There is a huge amount of REAL evidence that glaciers have advanced and retreated before - just like the world has warmed and cooled many times before - with CO2 playing zero factor. With all the very REAL, historically observed data, it's just silly to think that CO2 is the "control lever" that is driving whatever Climate Change is occurring now.