Answer:
Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use. Materials from the land's surface can move through the soil and end up in the groundwater.
Osmosis
Osmosis is the the movement of solvent (most of the time water)through a semipermeable membrane into a solution of higher solute concentration
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