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. That is why pollution can contaminate an aquifer.
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D? Seems the most reasonable and the rest seem to be realistic.
<span>Chemical reactions that ____________________ energy will not occur without a source of energy.
RELEASE
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