Real Reason Rain Smell So Good

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The “rain smell” is caused by a chemical in the bacteria called geosin, which is released by the bacteria as they die. 

When rain falls on the ground, certain chemicals are released, which gives off the odor we know as petrichor. It appears as though the planet is thanking everyone for enduring terrible thunderstorms and unexpected downpours without an umbrella.

Raindrops catch air bubbles containing geosmin when they contact the earth. The bubbles travel inside the raindrop and emerge as aerosols, which are even smaller particles distributed throughout the atmosphere. Human noses are particularly sensitive to geosmin, so once it is in the air and up off the ground, we can smell it clearly. Even at concentrations as low as five parts per trillion, some people can still smell it.

A mixture of plant oils is another component that contributes to petrichor. In times of dryness, several plants produce oils. The oils that had been building up are released into the air similarly to how geosmin is when it finally starts to rain.

You may credit ozone if the aroma is particularly potent—and curiously clean—after a thunderstorm. One of the substances required to produce ozone is nitric oxide, which can be formed when oxygen and nitrogen are broken apart by a lightning strike. The smell of the molecule, which resembles chlorine, is well known.

Also Read – Interesting Rainbow Facts That You Never Knew

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