A Valuable Gift, Riddle #6

In order to hear it, silence.

The sound is quiet but distinct,

like the pattering of many feet.

In order to see it, concentrate.

This is barely visible when mild

like a sparkle in a diamond.

In order to feel it, walk out.

Shrouded with the earth’s precious waste,

take care to go without haste.

In order to smell it, breathe.

Refreshed is the fragrance of pavement,

renewed is the day once passed.