Taking core samples from tree to study carbon retention Photo by Cydney Scott/Boston University.
Reinmann and Hutyra took core samples from about 200 trees to calculate how fast the trees grew, an indication of how much carbon they absorbed.

Fragmented forests may be better carbon sinks

New England forest edges absorb more carbon but suffer more heat stress.

Over the past centuries, as people have cleared fields for farms, built roads and highways and expanded cities outward, trees have been cut down. Since 1850, global forest cover has been reduced by one-third. The way forests look has also been changed: much of the world’s woodlands now exist in choppy fragments, with 20% of the remaining forest within 100 m of an edge like a road, back yard, corn field or parking lot.

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