Question

Earth has millions of litres of water but only a small amount of it is usable.Why?​

Answer 1

Answer:

The earth has an abundance of water, but unfortunately, only a small percentage (about 0.3 percent), is even usable by humans. The other 99.7 percent is in the oceans, soils, icecaps, and floating in the atmosphere. Still, much of the 0.3 percent that is useable is unattainable.

Answer 2

Answer:

• Water covers about 71% of the earth's surface.
• 326 million cubic miles of water on the planet
• 97% of the earth's water is found in the oceans (too salty for drinking, growing crops, and most industrial uses except cooling).
• 320 million cubic miles of water in the oceans
• 3% of the earth's water is fresh.
• 2.5% of the earth's fresh water is unavailable: locked up in glaciers, polar ice caps, atmosphere, and soil; highly polluted; or lies too far under the earth's surface to be extracted at an affordable cost.
• 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.
• This supply is continually collected, purified, and distributed in the natural hydrologic (water) cycle.

Explanation:

Earth has millions of water but a small amount of it is usable bcoz majority of quantity is unfit for drink and use only 2.5% of water on earth is fresh water but majority of this 2.5% is in glacier or in pond form so only 0.5% water is available for drinking.

plz mark me as brainliest plz