Chief Meteorologist at News 9 Gary England Excerpt:

"An examination of ice core data is frequently used as proof that CO2 heats the atmosphere. A close examination of that data shows that the air temperature went up first and then the CO2 went up. Mars is loosing pole ice faster that earth is loosing the same. As someone said recently, "It's the Sun stupid!" Recent research suggests that the activity of our Sun combined with cosmic radiation from far outside our galaxy interact with our atmosphere to produce effects never dreamed of a few years ago. Is anything or everything in this paragraph correct? No body really knows."

Source & full (worth reading) article: Associated Content