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Nitrogen-rich forest bedrock -- the geologic rock formation located under forest soil -- may aid trees in better sequestering carbon, according to a recent study that offers a new understanding on why some forests store greenhouse gases more efficiently than others. While geologic rock isn't a carbon sink itself, it plays an important role in helping the soil and trees above absorb CO 2 , say the study's authors, who published their findings last week in Nature . But a lack of research on nitrogen has left it largely ignored by climate scientists and policymakers scrambling to identify carbon sinks that mitigate carbon dioxide pollution from large emitters.
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