News From the Field
Plants Kept the Ice Age in Check
July 1, 2009
Existing climate models indicate that over the past 24 million years, geological conditions should have caused carbon dioxide levels in the Earth's atmosphere to plummet, possibly leading to runaway "icehouse" conditions. Yet the planet did not entirely freeze over. Now researchers writing in the July 2, 2009, edition of the journal Nature, report on the missing piece of the puzzle--plants.
Carnegie Institute for Science
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