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This level of carbon dioxide has not been seen on Earth for three to five million years, a period called the Pliocene. At that time, global average temperatures were 3 or 4C higher than today's and 8C warmer at the poles.
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Saint of the Day

March 27 Saint of the Day

St. Rupert
March 27: Bishop and missionary, also listed as Robert of Hrodbert. A ... Read More