Carbon in our atmosphere is a principal driver of climate change. And there's a massive amount of carbon locked up in the earth's northern polar region. So, NASA has decided to find out exactly how much carbon is in the Arctic region and how stable or unstable it might be and how it's reacting to climate change. Dr. Charles Miller, Research Scientist & principal investigator of the Carbon in Arctic Reservoirs Vulnerability Experiment (CARVE) - a five-year NASA-led field campaign studying how climate change is affecting the Arctic's carbon cyclem joins Thom Hartmann.
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