Border Patrol tests camera-toting balloon

The U.S. Border Patrol is considering another type of surveillance balloon that can be quickly moved to spot illegal activity, part of an effort to see if more eyes in the sky translate to fewer illegal crossings.

Spikes in carbon emissions detected with NASA satellite

Data from a circling NASA satellite shows spikes in carbon emissions worldwide, particularly in winter, along with new insights into the rising levels of pollutants that drive global warming, researchers said Thursday.

Tropical tree roots represent an underappreciated carbon pool

Ask someone to draw a tree and s/he will invariably draw a trunk and branches—leaving the roots out of the picture. In a unique study of tropical tree roots at the Smithsonian Tropical Research Institute published in PLOS ...

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