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  1. 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 …

  2. 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 …

  3. Ozone | Definition, Properties, Air Pollution, Importance, Structure ...

    Dec 12, 2025 · Ozone is an irritating pale blue gas that is explosive and toxic, even at low concentrations. It occurs naturally in small amounts in Earth’s stratosphere, where it absorbs …

  4. 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 …

  5. 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 …

  6. Ozone is a gas that is naturally present in our atmosphere. Ozone has the chemical formula O3 because an ozone molecule contains three oxygen atoms (see Figure Q1-1).

  7. Ozone (O₃) - Definition, Structure, Preparation, Uses ... - Examples

    Jan 28, 2025 · Ozone (O₃) is a type of gas found in the Earth’s atmosphere, made up of three oxygen atoms linked together. Unlike the oxygen we breathe, which has two oxygen atoms, …

  8. What is Ozone? – The Institute for Environmental Research and …

    Jun 17, 2025 · In the stratosphere, a layer between 6 and 30 miles above the Earth’s surface, ozone forms a protective shield known as the ozone layer. This layer absorbs the majority of …

  9. Greenhouse gases - U.S. Energy Information Administration (EIA)

    Ozone is technically a greenhouse gas, but ozone can be helpful or harmful, depending on where it is in the earth's atmosphere. Ozone occurs naturally at higher elevations in the atmosphere …

  10. What is Ozone? | California Air Resources Board

    Nov 6, 2020 · Ozone is formed in the atmosphere through chemical reactions between pollutants emitted from vehicles, factories and other industrial sources, fossil fuels, combustion, …