1) Higher levels of CO2 in the atmosphere continued for a significant period most probably will result in a net warming effect at or near the Earth's surface.
2) Humanity has been releasing higher and higher amounts of CO2 into the atmosphere over the last few centuries.
3) Processes that remove CO2 from the atmosphere have not been shown to have increased significantly over any significant part of the last few centuries.
4) Changes in other sources of CO2 released into the atmosphere are not comparable in magnitude to the change in the human release of CO2 over the same period of the last few centuries.
5) CO2 levels in the atmosphere actually are increasing over whatever measurable interval of the last few centuries is available.
6) Temperatures at or near the surface of the earth during whatever measurable interval of the last few centuries is available actually are increasing.
