In addition, because people are emotional beings who strive to be happy, they like to live full of pleasant feelings and emotions, and pleasant smells have a wonderful effect on this. Therefore, a person enjoys being in an environment with a pleasant smell, but runs away from a bad smell. There is no one who does not know that a person's mood is positive and optimistic when he is taking a walk and resting in the forest, flowery meadows, or fields. On the other hand, the smell of rotting, sweat, filth, and smoke has a negative effect on the human mind, and if used for a long time, it has a very bad effect on health and mood. Also, research has found that some smells affect the regulation of trade and purchasing needs, and when artificially smelling the smell of fresh bread in a grocery store, it is observed that the income of the store increases significantly. The Japanese use the smell of jasmine for trade, the Americans use grapefruit, and the Central Asians use the legendary patchouli. In addition, in 1939, Dr. D. I. Shatenstein scientifically established that the positive effect of scent on human brain activity, intellectual activity, and working ability is amazing. In modern times, aroma services are widely used for business purposes, and Japanese people have been successfully implementing certain aromas in the air conditioning system of workplaces and rooms in order to increase the productivity of their employees. Also, a construction corporation has developed and is using a computer system to distribute odors throughout the entire building area. This method of using smell is widely used, especially by organizations and factories with employees who work in the same way. A Japanese company called "Sumutsu" operates a special aroma room for its employees to refresh their energy and infuse certain scents into their offices. Before the meeting or consultation, the room is sprayed and vaporized. As a result, it was found that the errors made by employees were reduced by 3% when smelling jasmine, 20% when smelling lavender, and 54% when smelling lemon. Also, in this 18-year study involving people of all ages, the smell of lemon and eucalyptus relieves fatigue, restores the nervous system, improves intellectual capacity, improves work productivity, rosemary increases cognitive activity, improves memory, rose helps to focus quickly and do things quickly. It was found that there is a delivery service. Certain scents have also been shown to be incredibly effective at relaxing and relieving stress.