Folks, with tolerance do note that about 700 yrs ago Mr. Earth was several degrees warmer than it is now. We are at present in a mini ice age. For the science challenged and to wit reference Jame's B.'s original "Connections" on how climate change effected the 13-14 centuries, and indeed look up the fact that one major volcanic eruption, like Mt. St. Helens, puts more "global warming" gasses into the atmosphere than all the autos in the last century. A warmup of several degrees is inevitable, as is another ice age. Global warming is as natural as global cooling.