Which water source becomes polluted as it travels over the earth? ponds groundwater oceans runoff

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Which water source becomes polluted as it travels over the earth? ponds groundwater oceans runoff

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The answer is runoff. Runoff or surface runoff is used to refer to the flow of excess water on the earth’s surface. There are several sources for excess water. Some of these include storms, floods, urbanization, etc. It is the main cause of soil erosion by water, and one of the causes of water pollution.