The main source of fresh water on Earth is glaciers and ice caps, primarily located in polar regions like Antarctica and Greenland. Approximately 68.7% of Earth's fresh water is stored in these frozen bodies, with the rest found in groundwater, lakes, rivers, and the atmosphere. This distribution emphasizes the importance of preserving these ice reserves, as they are vital for maintaining ecosystems and global water supplies. Climate change poses a significant threat to these fresh water sources due to increasing temperatures and melting ice, which can lead to rising sea levels and the alteration of freshwater availability.