Who doesn't love getting some fresh air after rain? I think there are practically no such people. Scientists have long fought over why people like this smell. Some believe that our love for him remained from our distant ancestors, for whom rain was the main factor for survival. However, people do not love rain, but the smell after it. And scientists managed to find out this.
It turns out that people like not only this smell. There are several more that are associated with precipitation and also appeal to humans.
One of these odors is called petrikor. It appears after it has rained after a long drought. By the way, this name has existed for a very long time. To be a little more specific, 50 years.
In fact, this is not just rain, but a chemical reaction that occurs from the fact that during a drought, many plants release their oils, which subsequently react with the rain. It is the vapors released in this reaction that create a pleasant aroma that a person likes so much.
As mentioned earlier, there are other odors associated with this precipitation. It turns out that soil bacteria can also react with rain. This leads to the derivative, in our case to the smell of rain.
And, of course, the smell of ozone. It is he who is primarily associated with rain. All this happens because a thunderstorm splits hydrogen and nitrogen in the atmosphere, which subsequently interact with each other and form nitrogen oxide. Then it enters into chemical reactions with substances that are present in the air, which ultimately leads to a pleasant, pungent smell, that is, to ozone.