> Superb New Scientist special guide debunking the top 26 'anti global > warming' myths. > >snip snip > > With all this good science in support, how can anyone possibly > question its reality? > > snip snip > > "Most of the observed increase in globally averaged > temperatures since the > mid-20th century is very likely due to the observed increase > in anthropogenic greenhouse gas concentrations Surprisingly Russell (given his love of all things exo-atmospheric) left off one pointed comment (of which I am certain he is aware): Planetary studies of Titan, Venus, and Mars have fairly conclusively proven the veracity of the effect of greenhouse gases in raising planetary surface temperatures above where orbital insolation suggests they should be, and large amounts of suspended particulates in the atmosphere tend to increase albedo causing a drop in planetary surface temperatures. So, in short, the reason we haven't seen runaway temperature increases may not be because the effect isn't real, it may be that the ash and particulates produced by coal and diesel and other less-than-optimally-clean greenhouse gas producing energy generation methods is offsetting the effect of the gases. Mike H. who has been reading a lot of space science books lately. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist