The most recent Forest Service figures show that US forests offset about 14% of the nation’s carbon emissions each year. Under the United Nations Framework Convention on Climate Change, ratified in 1994, governments are required to report annual estimates of carbon holdings in all their managed lands. While the first round of his research was a proof of concept that necessitated the destruction of 39 trees to show that tomography is accurate, his ultimate goal is a nondestructive technique to enable better assessments of carbon sequestration than those done annually by the US Forest Service. The worldwide level of CO2 is currently averaging more than 400 parts per million-the highest amount by far in the last 800,000 years.Ĭhina is trying to steal military space tech. As anyone following the fires burning in the Amazon rainforest knows by now, trees play an important role in helping to offset global warming by storing carbon from atmospheric carbon dioxide-a major contributor to rising temperatures-in their wood, leaves, and roots. These cross-sections of tree trunks, known as stem disks-or more informally as cookies-are telling a potentially worrisome tale about the ability of forests to be critical hedges against accelerating climate change. There, past piles of empty beehives, on a wall of metal shelves, were stacks of wooden disks-all that remains of 39 trees taken down in 2014 from Great Mountain Forest in the northwest corner of the state. B ob Marra navigated his way to the back of a dusty barn in Hamden, Connecticut, belonging to the state’s Agricultural Experiment Station.

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