james rogers jamesrbestcom mon 20020923 1353 jim whitehead wrote explained increase co2 concentrations contributing increasing global temperature number reasons think co2 important controlling global temperature much co2 increase may anthropogenic recent research points worth mentioning recent highresolution studies historical co2 concentrations temperatures hundreds thousands years shown modest correlation two number cases co2 level increases phase temperature increases actually trail increase temperature short time ie increases temperature preceded increases co2 concentrations studies done geological record seems co2 concentrations correlated temperature increases significantly causative lot evidence co2 levels regulated fairly stable fashion dont believe anyone really authoritative answer exactly works yet respect absolute co2 concentrations also important point best data date suggests follow fairly regular cycle period 100000 years previous cycle peaks concentrations similar cycle validity good data 45 complete cyclical periods look surprisingly regular shape time almost exactly peak right happens current co2 concentrations within 10 previous cyclical concentration peaks good data words may adding co2 levels looks lot like would building molehill top mountain historical record least nothing anomalous current co2 concentrations also co2 levels interact biosphere manner ultimately affects temperature interaction entirely predictable believed one regulating negative feedback systems mentioned last greenhouse gases go co2 isnt particularly potent although makes volume cases gases water methane far greater impact greenhouse gases per molecule basis water vapor may actually key greenhouse gas something co2 indirectly effects interaction biosphere co2 easy mark early environmentalism recent studies data ive seen gives impression largely passenger climate ride rather driver certainly dont think healthy fixation actually interested understanding warming trends cheers james rogers jamesrbestcom 24 sep 2002 094242 0700 co2 climate goodbye global warming