archival photo from the original excavations at La Brea Tar Pits (IMAGE)
Caption
Some of the key samples in the study came from the La Brea Tar Pits in Southern California, where researchers analyzed ancient juniper wood preserved in tar. The team found clear signs of elevated photorespiration in the samples, meaning that the trees were releasing CO2 back into the atmosphere nearly as fast they removed it. This archival photo from the original excavations at La Brea Tar Pits shows a tree used in the study.
Credit
Courtesy of La Brea Tar Pits
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CC BY-NC-ND