jim whitehead ejwcseucscedu historical record mean human historical record highly overrated nigh worthless talking geological timescales even topics short timescale climate significant recent increase global co2 concentrations vast preponderance new co2 atmosphere due human activity starting around industrialization europe accelerating wwii scientists studying global climate change believe increased co2 concentrations primary causal agent increased global warming hence interest items human time scale worth noting underneath receding glaciers deposited last major ice age finding substantial evidence humans living nice temperate climate glaciers paved civilization receding glaciers turned bit archaeological treasure chest expose artifacts buried underneath shrink preserved ice thousands years dont see compelling reason save glaciers anyway particularly light fact existence always transient global climate change scientists would agree temperatures past often much warmer today point global warming isnt save earth planet sentient point understand potentially reduce impact increasing temperatures global human activity anyone insist current negligible fluctuations anthropogenic heaps one ridiculous assertion upon another ill stick occams razor increase atmospheric co2 concentration due human activity generally accepted increases co2 closed environment subject solar heating retain solar energy current best explanation high temperature venus co2 concentration goes globally theory states earth retaining greater solar energy process may slow may difficult monitor due variability temperatures worldwide encourage refute part causal chain linking co2 eventual increases global energy content part evident heat jim mon 23 sep 2002 135356 0700 goodbye global warming