AP BIOLOGY

Detailed explanation-1: -Fresh water makes up under 3% of all water on earth, and nearly 65% of this drinkable water is tied up in glaciers. Rivers, streams, lakes, and dams that hold freshwater contain 1% of potable water while groundwater accounts for 0.3%.

Detailed explanation-2: -Of all the water that exists on our planet, roughly 97% is saltwater and less than 3% is freshwater. Most of Earth’s freshwater is frozen in glaciers, ice caps, or is deep underground in aquifers.

Detailed explanation-3: -Most of Earth’s fresh water is locked in ice Over 96% of Earth’s water is saline (salty) and found in the ocean. Only a little over 3% of Earth’s water is fresh. Most of that fresh water (68.7%) is frozen in glaciers and ice caps.

Detailed explanation-4: -The hydrosphere is the sum of Earth’s water, in the ocean, the ground, on the surface, and in the air. Approximately 71 percent of Earth’s surface is covered in water. Of all of that water, only about three percent is freshwater. An even smaller amount can be used as drinking water.