EVERYDAY SCIENCE

Detailed explanation-1: -And, of the total freshwater, over 68 percent is locked up in ice and glaciers. Another 30 percent of freshwater is in the ground. Fresh surface-water sources, such as rivers and lakes, only constitute about 22, 300 cubic miles (93, 100 cubic kilometers), which is about 1/150th of one percent of total water.

Detailed explanation-2: -Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps.

Detailed explanation-3: -Although in warm periods such as the Mesozoic and Paleogene when there were no glaciers anywhere on the planet all fresh water was found in rivers and streams, today most fresh water exists in the form of ice, snow, groundwater and soil moisture, with only 0.3% in liquid form on the surface.

Detailed explanation-4: -Of total freshwater, over 68 percent is locked up in ice and glaciers.

Detailed explanation-5: -The Antarctic ice sheet holds about 90 percent of the fresh water that exists on the Earth’s surface. The ice sheet covers approximately 8.7 million square miles. The Greenland ice sheet also contains large volumes of fresh water.