Ever hopped into a car and taken a deep breath of that unmistakable new car smell? It’s a scent that many people love, but have you ever wondered what you’re actually inhaling?

That new car smell comes from a mix of chemicals called volatile organic compounds (VOCs). These compounds come from the materials used in the car’s interior – things like plastics, adhesives, and fabrics. When a car is fresh off the assembly line, these materials release gases, a process known as off-gassing. It’s these gases that create the distinct new car aroma.

So, what are some of these VOCs? Common “star players” include formaldehyde, toluene, and benzene. Yummy. While they contribute to that fresh car scent, they’re not exactly great for your health in high concentrations. Studies have shown that these chemicals can cause headaches, dizziness, and even respiratory issues for some people. What’s more, Forbes reported earlier this year that today’s “new car smell” contains cancer-causing carcinogens. According to the cited Beijing study, new SUVs had extra-high concentrations of risky chemicals on hot days.

The “good” news is that the concentration of VOCs decreases over time. That strong new car smell will fade as the vehicle ages and as the materials finish off-gassing. In fact, most of the VOCs will significantly drop within a few months.

By now, of course, automakers are aware of the health concerns and are constantly working to reduce the amount of VOCs in new cars. They use lower-emission materials and better ventilation systems to keep the air inside your vehicle cleaner.

While the new car smell might be nostalgic and pleasant, it’s a good idea to ventilate your car regularly, especially when it’s brand new. Roll down the windows and let some fresh air in – your lungs will thank you.