Groundwater can dissolve rocks because it contains weak carbonic acid which forms when rainwater dissolves carbon dioxide from air.

a. true
b. false


Ans: a. true

Environmental & Atmospheric Sciences

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There are about 3.5 million homeless people in the United States currently. About how many homeless people are there in Washington, D.C?

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Which of the following objects is not part of the vector data model in ArcGIS?

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