Fall Trivia:Why can you smell Petrich in the fall after the rain?

Petrichor is a new word that was created in 1964 to describe the aroma after the rain. Raindrops fall into the dust and collide with bacteria and vegetable oil to produce aerosols that release a unique aroma in the air.

The smell we smell also includes ozone, which forms before the rain, is brought to the ground by the thunderstorm, and smells like chlorine.