| Sourced From Chron.com |
Carbon dioxide in the earths atmosphere has risen to its highest level in at least 2.1 million years, according to a new investigation of the greenhouse gass role in ice ages over the millennia.
Researchers including Columbia Universitys Baerbel Hoenisch drilled into the ocean floor off the coast of Africa to remove shells of ancient marine animals called foraminifera that contain climate records, according to the study published today on Sciences Web site. Previous evidence of CO2 concentrations found in columns of Arctic ice go back just 800,000 years.
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Tags: air carbon, America, Carbon Dioxide