Environmental
What is 'impervious surface' and why does Delaware regulate it?
AA surface that is resistant to fire damage, used in commercial roofing
BA surface that does not allow water infiltration (pavement, rooftops, concrete) — Delaware regulates impervious cover to control stormwater runoff, protect water quality, and prevent flooding✓ Correct
CA surface that resists chemical contamination, required near industrial sites
DA hardened boundary marker used in Delaware land surveys
Explanation
Impervious surfaces (roads, parking lots, rooftops, driveways) prevent rainwater from infiltrating the soil, increasing runoff volume and velocity. Delaware regulates impervious surface coverage through local zoning and stormwater ordinances, particularly in its coastal areas and Chesapeake Bay watershed. Excessive impervious cover contributes to flooding, erosion, and water quality degradation.
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