Earth

Which of these terms means "protecting and using a resource wisely"?

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What is water treated with to prevent bacteria from growing?
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What is the low pressure area along the equator called?
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What is the area filled with groundwater called?
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What is petroleum as found in the earth, before it is refined?
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What kind of storm might produce a "whiteout"?
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What is the term for when pieces of glaciers break off and form icebergs?
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What season has the warmest weather in the U.S.?
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What does granite become when put under heat and pressure?
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