| Parrot - interesting graphs.
Particularly the 2nd one, that shows the temp changes during the last interclacial period. Seems even the 'mideival warming' period is several degrees cooler than the peak warm points preceding the last ice age. Judging by that graph:
1) the Earth has substantial average warming to undergo (naturally) before a glacial cycle begins again.
and
2) naturally occuring temp changes (before human evolution) are far more drastic than the change humans may have induced over the past 150 yrs.
Not saying humans don't cause changes in climate ... but its humbling to notice the extremes of climate change that mother nature caused long before we started firing 2 stroke engines and coal plants. |