Answer:
Scientists can drill deep into the ice to collect ice cores.
Step-by-step explanation:
Scientists can drill deep into the ice to collect ice cores as this method helps to find out the past properties of the atmosphere and how it acted in the past.
It also ensures and explains how the climate was when there were precipitation which includes snow, rain etc and also how the size of ice sheets and glaciers have changed in the past in response to different climate and different eras.