Ozone - Wikipedia
Ozone is formed from dioxygen by the action of ultraviolet (UV) light and electrical discharges within the Earth's atmosphere. It is present in very low concentrations throughout the atmosphere, with its …
What is Ozone? - US EPA
Jun 6, 2025 · Stratospheric ozone is formed naturally through the interaction of solar ultraviolet (UV) radiation with molecular oxygen (O2). The "ozone layer," approximately 6 through 30 miles above the …
Ozone - American Lung Association
Jun 9, 2025 · Ozone (also called smog) is one of the most dangerous and widespread pollutants in the U.S. It may be hard to imagine that pollution could be invisible, but ozone begins that way. As ozone …
What is Ozone (O₃)? - Clean Air Initiative
1 day ago · Quick Answer: Ground-level ozone (O₃) is a colorless gas that forms when nitrogen oxides (NOₓ) and volatile organic compounds (VOCs) react in sunlight. Unlike protective ozone in the upper …
Ozone layer | Description, Importance, & Facts | Britannica
Jan 31, 2026 · ozone layer, region of the upper atmosphere, between roughly 15 and 35 km (9 and 22 miles) above Earth’s surface, containing relatively high concentrations of ozone molecules (O 3).
What Is Ozone? Formation, Health Effects, and Uses
6 days ago · Ozone is a gas made of three oxygen atoms (O₃) instead of the two atoms in the oxygen we breathe. It is highly reactive, meaning it readily interacts with other molecules, which makes it …
Nasa Ozone Watch: Ozone facts
Sep 23, 2024 · Ozone is a gas made up of three oxygen atoms (O 3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere). Ozone protects life on Earth from the Sun’s …
Ozone and You | Ozone Secretariat
What is the ozone layer? The ozone layer is a region of high ozone concentration in the stratosphere, 15 to 35 kilometres above Earth's surface. The ozone layer acts as an invisible shield and protects us …
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What Is Ozone? Definition and Facts - Science Notes and Projects
Jan 26, 2022 · Ozone is an inorganic oxygen molecule with the chemical formula O 3. It is a reactive allotrope of oxygen that also goes by the name trioxygen. Ozone protects the planet from harmful …