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  2. Ground-level ozone - Wikipedia

    en.wikipedia.org/wiki/Ground-level_ozone

    Ground-level ozone (O 3), also known as surface-level ozone and tropospheric ozone, is a trace gas in the troposphere (the lowest level of the Earth's atmosphere), with an average concentration of 20–30 parts per billion by volume (ppbv), with close to 100 ppbv in polluted areas.

  3. Ozone depletion - Wikipedia

    en.wikipedia.org/wiki/Ozone_depletion

    Ozone depletion consists of two related events observed since the late 1970s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere, [citation needed] and a much larger springtime decrease in stratospheric ozone (the ozone layer) around Earth's polar regions. [1] The latter phenomenon is referred to as the ...

  4. Tropospheric ozone depletion events - Wikipedia

    en.wikipedia.org/wiki/Tropospheric_ozone...

    Ozone (O3) is a trace gas which has been of concern because of its unique dual role in different layers of the lower atmosphere. [1] Apart from absorbing UV-B radiation and converting solar energy into heat in the stratosphere, ozone in the troposphere provides greenhouse effect and controls the oxidation capacity of the atmosphere. [1]

  5. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    The highest levels of ozone in the atmosphere are in the stratosphere, in a region also known as the ozone layer between about 10 and 50 km above the surface (or between about 6 and 31 miles). However, even in this "layer", the ozone concentrations are only two to eight parts per million, so most of the oxygen there is dioxygen, O 2 , at about ...

  6. Ozone hole is about average size, despite undersea volcano ...

    www.aol.com/news/ozone-hole-average-size-despite...

    With last year’s undersea volcano injecting massive amounts of water high into the atmosphere, scientists were bracing for a big Antarctica ozone hole this fall. Instead this year’s ozone hole ...

  7. Ozone and biology - Wikipedia

    en.wikipedia.org/wiki/Ozone_and_biology

    Ozone cycle illustrated over image by NASA astronaut Scott Kelly. Ozone is a ubiquitous yet highly reactive molecule in the atmosphere. Such a highly reactive oxidizer would normally be dangerous to life but ozone's concentration at sea level is usually not high enough to be toxic.

  8. Wind is blowing China's air pollution 'straight across' to ...

    www.aol.com/article/2015/08/16/wind-is-blowing...

    A new study links the increase in ozone precursor emissions in Asia to increased levels of ozone over the US's West Coast. Skip to main content. 24/7 Help. For premium support please call: 800-290 ...

  9. Metro Jacksonville gets A grade in ozone pollution, but air ...

    www.aol.com/news/metro-jacksonville-gets-grade...

    For the first time, an annual air quality report listed the Jacksonville metropolitan area as one of the cleanest in the U.S. for ozone air pollution.