Ref at
http://www.nature.com/news/2008/080514/full/news.2008.825.html
Ice cores reveal climate secrets
The amount of greenhouse gas in the atmosphere is higher than an any
other point
in the past 800,000 years.
Greenhouse-gas concentrations are higher today than they have been at any
point
in hundreds of millennia, according to researchers who have analysed tiny
air
bubbles trapped in Antarctic ice that dates back 800,000 years.
Atmospheric levels of carbon dioxide are now more than 28% higher than at
any
other point in the time period covered by the samples, according to
Thomas
Stocker, one of the authors of two studies in this week's Nature 1,2 and
a
climate scientist at the University of Bern in Switzerland. Levels of
methane,
another major contributor to climate change, are now 134% above
prehistoric
highs.
...
RT
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