Scientists examine these to assess levels of carbon dioxide through history.

Question

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Ice cores are the best choice for examining carbon dioxide levels through history as they provide a continuous record of atmospheric composition dating back hundreds of thousands of years. The ice traps air bubbles which can be analyzed to determine the composition of the atmosphere at the time the ice formed. Sedimentary and peat cores can also be used to examine historical levels of carbon dioxide, but they may not provide as complete or continuous a record as ice cores. Tree rings can only provide information about carbon dioxide levels during the life of the tree, which may be limited in comparison to the timescale of ice cores.

Scientists Examine These to Assess Levels of Carbon Dioxide Through