Although I like Al a lot he should not have hopped onto the band waggon of this mass hysteria about a climatic change. A climatic change cannot be judged over fifty years. That takes thousands of years. For example, 1.300 years ago, so archeologists discoverd that in the nineth century they had a much warmer winter than the last one in the Bavarian Alps!!! Who was to blame then??? Perhaps the withdrawing Romans in their millions with their horses and thez all let out some sort of flatulence. Another group of archeologiswt discovered that 10,000 years ago there grew tropic fauna and flora in the Outer Hebrides in the far north of Scotland. Who was to blame then??? Mr. Al Gore. I myself remember (am 63 now) mild winters and cold summers, tornadoes, et. al. some forty years ago. I have no more respect of those Swedes who hand their "nobel prices". There is nothing nobel about that price anymore. They haven't got a clue who has done what to deserve it. Sorry Al, you're on the wrong train. Enjoy the price, publicity and the money but please keep quiet about something you don't understand. Tip: Make your self clever about "Precession and nutation about the sun, earth, moon and all the other planets and their moons!!!! In 40,000 years will polaris no longer be the north star but it will be around Vega!!!! And that causes the climatic changes. But dear Al, you won't live long enough to really follow up a real climatic change.

Unbelievable. Not only can this writer not spell, he (she?) is so ignorant of science that I'm worried that our education system failed him (her?). Sad. The warm period spoken of was part of the broader post glacial warming, interrupted by the Younger Dryas cold spell and Little Ice Age. The period, however, has been, on the whole, a warmer interlude. The recent forcings of Co2 et al have not fit the patterns seen in prior spikes, and are tied to timelines concurrent with industrial development and fossil fuel use. Thus, the recent set of historic records for temperature are definitely cause for concern. As for the planetary stuff, well......huh? I'm fifty-nine, and can research. Can't you at sixty-three?