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Shrubs and grass in Greenland shift the carbon balance

For the online magazine Science Nation, PBS NewsHour correspondent Miles O’Brien speaks to Penn State University’s Sean Cahoon about what the Greenland tundra plants mean for the planet.

As the ice sheets rapidly melt and slough away from Greenland, scientists are seeing changes in the plants underneath — more woody shrubs, fewer grasses. But the shrubs take up different amounts of carbon dioxide, and that could drive further changes.

Editor’s note: Science Nation is funded by the National Science Foundation, which is also an underwriter of PBS NewsHour.

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