yes. In the higher atmosphere, molecular oxygen (O2) is split by sunlight and turns them into single atoms of oxygen. These single oxygen atoms then combine to available O2 molecules, making ozone, O3. Most of the created ozone converts readily back to oxygen, but small amounts of ozone persists.
On our level of the atmosphere, more complex but similar chemical reactions take place as a result of pollutants caused by industrialization and vehicle traffic. In unpolluted air, we generally breathe in 10 to 15 parts of ozone per billion parts of air. In polluted air, we breathe in as much as 125 parts of ozone per billion parts of air.
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