Have you ever noticed a distinctive scent in the air after it rains? In fact, you’ve probably smelled a variety of odors after a rainstorm, depending on whether you were in the woods or on a city street at the time. Often associated with spring, these post-storm aromas are caused by several factors. One of these smells, for example, is linked to actinomycete bacteria. The force of the downpour releases the bacteria’s spores into the air, like an aerosol air freshener. Other odors stem from acid rain, which breaks down organic material, releases minerals trapped in soil and reacts with chemicals on the ground.