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Which is one way that analyzing ice benefits scientists who study ancient climates?

Scientists can analyze frozen volcanic dust to help predict eruptions.
Scientists can study the layers of ice cores to gather information about past atmospheric composition.
Scientists can use sand grains in ice to make inferences about the climate area.
Scientists can study tree rings in ice to learn more about past climates.

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Scientists can study the layers of ice cores to gather information about past atmospheric composition.

Ice cores trap air bubbles and particles that preserve past greenhouse gas concentrations and isotopic signatures, letting scientists reconstruct ancient temperatures and atmosphere.