Which of the following is true about impervious building materials?
a.
impervious surfaces prevent pollutants from entering the water supply.
b.
vegetation and gravel are common impervious materials.
c.
having fewer impervious surfaces improves water drainage.
d.
all of the above

The correct answer is C. Having fewer impervious surfaces improves water drainage.

Impervious surfaces are termed as artificial structures. For example, pavements, logistics, ports and airports.

They are being covered by impenetrable materials.

For example rooftops, stone, brick, asphalt, and concrete.

Pavement are good material which seals the soil surface so as to eliminate groundwater recharge and rainwater infiltration.

The correct answer is option C

Impervious materials can be defined as the materials that does not allows the water to move inside the ground (soak). Some natural surfaces can be relatively impervious like compacted clay.

Having fewer impervious surfaces improves water drainage of the roads. It actually repels the rainwater and does not allows infiltration of water.

This helps to improve water drainage system.

radon is correct hope this