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Drew Budner (cq), a Ph.D. candidate in chemistry at South Dakota State University, cuts samples from a piece of ice that was formed in the late 1700's and the early 1800's that he will take back to school and analyze for major ions, like sulfate, which would have come from a major volcanic eruption around the same time in Tambora. This is for the next installment of Jim Erickson's "A Change in the Air" climate series. Workers and students at the National Ice Core Laboratory use a table saw to slice up chunks of ice cores from the South Pole. The ice cores contain air bubbles that contain a record of past climates. They've been used to reconstruct ancient climates and CO2 levels. (JUDY WALGREN/ROCKY MOUNTAIN NEWS) Drew Budner (cq)

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