Root Fungus Stores a Surprising Amount of the Carbon Sequestered in Soil

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A forest floor can store lots of atmospheric carbon, helping to limit global warming that results from carbon dioxide emissions. Most of that storage, scientists have thought, is found in tree leaves and branches that absorb carbon, eventually fall to the ground and slowly decay into soil. A new study in Sweden, however, indicates that 50 to 70 percent of the carbon bound in soil is actually from tree roots and the fungi that grow on them.
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