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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 4 Saint of the Day

St. Casimir
March 4: Casimir grew up in a world where his life was not his own. As a ... Read More