In the 70's we were going through "GLOBAL COOLING" due to the carbon in the atmosphere.

PHILADELPHIA â?? The rise of the Appalachian Mountains may have caused a major ice age approximately 450 million years ago, an Ohio State University study has found.

The weathering of the mountains pulled carbon dioxide (CO2) from the atmosphere, causing the opposite of a greenhouse effect -- an "icehouse" effect.
Appalachian Mountains, Carbon Dioxide Caused Long-Ago Global Cooling

Have a good one!:s4: