A substance that does not allow water to flow through it is

As wells use water it causes this to drop

How much of the earths water is freshwater?

Out of the freshwater on the earth how much is actually usable by humans?

Most of the earth's freshwater is locked away in

Which ZONE is immediately above the zone of saturation

What is something that is bad for our groundwater?

A drought (period of no rain) will cause what to happen to the water table?

What percentage of the earth's water is salt?

What is the term for water soaking into the ground recharging the water table.

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