Limonene, commonly known as lemon essential oil, is usually used to make citrus fragrances and is one of the important chemical components of many air fresheners, body sprays and other aromatics  Limonene itself is not terrible, because it is not harmful to the human body  In fact, it can be used as a flavoring agent for food  However, once the limonene is sprayed into the air, it will quickly change  Studies have shown that when the limonene is exposed to ozone which is common in the air, two limonene molecules will form a single-molecule compound methanol
When a large amount of limonene in the room is converted to methanol, its effect will be very different
In life, we should try to avoid using objects containing limonene.