GEOLOGY

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.

Detailed explanation-2: -The total volume of water on Earth is estimated at 1.386 billion km³ (333 million cubic miles), with 97.5% being salt water and 2.5% being fresh water.

Detailed explanation-3: -0.5% of the earth’s water is available fresh water. If the world’s water supply were only 100 liters (26 gallons), our usable water supply of fresh water would be only about 0.003 liter (one-half teaspoon). In actuality, that amounts to an average of 8.4 million liters (2.2 million gallons) for each person on earth.

Detailed explanation-4: -Lake Baikal is the largest freshwater lake by volume (23, 600km3), containing 20% of the world’s fresh water.