After the rain, the air becomes clean and fresh. The rain washes away the dust particles hanging in the air and removes them from the air. Then moisture keeps dust in the ground so that it may not float around. Moist air also carries the smell of moist grass and soil more effectively to your nostrils. The moisture even makes the inside of the nostrils damp so that the air may smell fresh and you can smell fresh scents.
Why does the air smell fresh after the rain?
