Smell of rain

On my way home from work, my coworker said, “I can smell rain.”

I had never really thought about it before, but apparently, rain does have a scent.

Plant oils, geosmin produced by soil microbes, and ozone.

By the way, it was perfectly sunny that day, and it didn’t drizzle until two days later.

I wonder how many days in advance the smell of rain works.