A Warming Effect Photos
Antarctic scientist Paul Mayewski, in black, director of the Climate Change Institute at the Univ. of Maine, is on the plateau to drill an ice core because, when ice is laid down, it captures everything in the air. “The ice cores are really the only way we have of demonstrating what greenhouse gas levels were like prior to their first measurement by humans,” he explains.
(Photo: CBS/Catherine Herrick)
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