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A team of glaciologists led by Dr. Isaac Chen recently analyzed ice cores from the Greenland ice sheet. They found that during periods of rapid warming, the concentration of atmospheric dust decreased significantly. Chen's team ________ that the increased moisture in a warmer atmosphere leads to more frequent precipitation, which effectively 'washes' dust out of the air before it can reach the arctic regions.

  1. Denied
  2. Recalled
  3. Proposed
  4. Concluded

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