Earth is known as the blue planet because 71% of the earth's surface is covered with water. But we still face water shortage. What can be the possible reason for this?

Earth is known as the blue planet because 71% of the earth's surface i

1.	Earth is known as the blue planet because 71% of the earth's surface is covered with water. But we still face water shortage. What can be the possible reason for this?
Answer» Earth is known as the blue planet because 71% of the earth's surface is covered with water. But we still face water shortage. What can be the possible reason for this?