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Politics : President Barack Obama -- Ignore unavailable to you. Want to Upgrade?

To: ChinuSFO who wrote (16998)	4/10/2008 2:39:48 AM
From: Wharf Rat	Read Replies (2) \| Respond to of 149317

LOL. You need to take some science classes. Here we are, in the most scientifically advanced country, the only country to land people on the moon thanks to science, the people who were able to diagnosis, find, come up with vaccines, and extend the life of AIDs pts. in only 10 years, who can sequence the human genome, who can develop the Bomb, all with science, and yet that same science is no good when it says "CO2 absorbs IR heat, keeping it from going into space, and raising the temperature of the planet." The only natural cycle here is that we are taking CO2 which the planet took 14 months to sequester thru biologic and physical processes, and we are dumping it back into the atmosphere in one day. Every day, another 14 months of prehistoric CO2 released again. If anything, the natural cycle, the Milkanovich cycle should have us cooling a bit. This is not natural. Welcome to the Anthropocene Era; climate shaped by man.

To: ChinuSFO who wrote (16998)	4/10/2008 11:31:11 PM
From: RetiredNow	Respond to of 149317

Hi Chinu, What we are experiencing is cyclical over geologic time, but not within the 800,000 years of data we have. Within that narrow range of years, we are experiencing what we would call persistent outlying data that is indicative of systemic changes taking place. There is no room for doubt that something very unusual is taking place within that timeframe. Now, if we use geologic timescales, then the data tells a different story. We are actually CO2 impoverished in comparison with estimates from millions of years ago. There was only one other period with CO2 levels as low as we have now and that was the Carboniferous period some 300 million years ago. So the real question is can we avoid a return to times where CO2 and temperatures rose so high as to make the earth uninhabitable for humans. "Earth's climate and atmosphere have varied greatly over geologic time. Our planet has mostly been much hotter and more humid than we know it to be today, and with far more carbon dioxide (the greenhouse gas) in the atmosphere than exists today. The notable exception is 300,000,000 years ago during the late Carboniferous Period, which resembles our own climate and atmosphere like no other. With this in mind the road to understanding global warming and our present climate begins with an historical journey through a chapter in Earth's history, some 30 million years before dinosaurs appeared, known as the Carboniferous Period-- a time when terrestrial Earth was ruled by giant plants and insects, and glaciers waxed and waned over a huge southern continent... Following the Carboniferous Period, the Permian Period and Triassic Period witnessed predominantly desert-like conditions, accompanied by one or more major periods of species extinctions." geocraft.com Global Temperature and Atmospheric CO2 over Geologic Time