Scientist drill ice cores from inside the polar ice cap in Antarctica to study variability of climate and differentiate that variability From global climate change. Each layer of the ice tells about weather and what the Earth was like when the first snow fell.
For example, Le grande says that as snow deposits into a growing glacier, the temperature of the air imprints on water molecules.
Icy layers hold particles,aerosols, sea salts, trace elements that were in the atmosphere before and they abide for thousands of years and provide evidence of past events.
One positive choice someone can make to help their health would be to exercise if you are overweight. One negative choice someone can make that can worsen their health would be drinking any alcohol. Exercising when overweight can help your health by decreasing chances of heart diseases and drinking any alcohol to an excessive extent can harm your liver which can lead to death or a journey of pain and complications.
