Did you know that if you take all the water on earth including
ice, moisture from the air etc and gather it as one ball, the
ball is no bigger 1400km in diameter. That's like a waterdrop
compared to a tennisball if put beside earth.

If you take only the fresh and drinkable water on earth, the drop
is only 62km in diameter. That's like a flea on a dog in the same
comparison.

If you take all the air, and press it tight as it would be in sea-level
pressure, the diameter of the ball would be only 2000km. Even when
the atmosphere goes up to 100km, the air thick enough to breathe
by a 'normal' person goes only 5km from the ground.

Comparing that there are some 6 billion people in the world, that
amount of fresh water, or breathable air isnt that much.

Makes one think some values...