Final answer:
Most of the Earth's freshwater is stored in icecaps and glaciers, with a significant amount also found in groundwater. While 3% of Earth's water is fresh, much of it is inaccessible, leaving a limited supply of freshwater for human consumption.
Step-by-step explanation:
The majority of Earth's freshwater is found in icecaps, glaciers, and inland seas. Specifically, most of the freshwater, about 68%, is locked up in the ice sheets of Antarctica and Greenland. Of the roughly 3% of the Earth's water that is fresh, the vast majority is not easily accessible to humans because it is either trapped in glaciers or exists as ground ice.
In terms of liquid freshwater, the largest reservoirs are found in groundwater, but this too can often be challenging to access. The remaining accessible freshwater, which is much less in volume, is found in rivers, lakes, and shallow subsurface aquifers. This distribution significantly impacts the availability of drinking water for communities around the world.