Assuming global warming exists and is caused by carbon emissions…How do you explain the absence of the huge glaciers that carved out places like Glacier National Park? These clearly disappeared more than 200 years ago. (200 based on written accounts of the area, not scientific research).
Side Note: Although I disagree with the hypothesis of Global Warming, I do like the solution: clean up our act. I believe in being conservative with our resources…in the long run it saves green stuff.