What is the difference between pervious and impervious surfaces?

An impervious surface is one that is impermeable and one that water cannot pass through. Impervious surfaces increase runoff and include surfaces like asphalt, buildings/rooftops, concrete, etc.

 A pervious surface is one that allows for the penetration of runoff through the surface and into the underlying soils. Examples of pervious surfaces include vegetated lawns, gardens, pervious pavers, and other surfaces designed to absorb stormwater runoff.

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3. What is the difference between pervious and impervious surfaces?
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