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Climate Cast: How the decline of the Amazon rainforest is changing the climate

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Tropical rainforest
Tropical rainforests store vast amounts of carbon.
Photo courtesy of David Tilman

The Amazon rainforest is the largest in the world. It covers more than 2.3 million square miles. And about 20 percent of the Earth's oxygen is produced there.

New research shows that the Amazon rainforest isn't absorbing as much carbon dioxide as it once was. Kerri Miller and Paul Huttner with MPR News talk with one of the lead researchers.