Stomata Story (IMAGE)

Columbia Climate School

Stomata Story

Caption

Fossilized leaves hold evidence of a sharp increase in carbon dioxide levels as the Antarctic ice sheet began to shrink 23 million years ago, a new study finds. This magnified image of a fossilized Litsea calicarioides leaf clearly shows the stomata, through which leaves take in CO2 and release oxygen.

Credit

Tammo Reichgelt/Lamont-Doherty Earth Observatory

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