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  2. 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 ...

  3. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    It is dangerous to allow this liquid to warm to its boiling point, because both concentrated gaseous ozone and liquid ozone can detonate. At temperatures below 80 K (−193.2 °C; −315.7 °F), it forms a violet-black solid .

  4. 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.

  5. Ozone depletion potential - Wikipedia

    en.wikipedia.org/wiki/Ozone_depletion_potential

    The ozone depletion potential (ODP) of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane (R-11 or CFC-11) being fixed at an ODP of 1.0. Chlorodifluoromethane (R-22), for example, has an ODP of 0.05. CFC 11, or R-11 has the maximum potential amongst chlorocarbons because of the ...

  6. Scientists find landmark treaty spares a stunning 443 million ...

    www.aol.com/scientists-landmark-treaty-spares...

    The unexpected discovery of a gaping hole in Earth's ozone layer alarmed scientists in the 1980s, because this ozone protects our bodies from harmful solar radiation. During the 20th century ...

  7. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    The ozone AQI between 100 and 300 is computed by selecting the larger of the AQI calculated with a 1-hour ozone value and the AQI computed with the 8-hour ozone value. Eight-hour ozone averages do not define AQI values greater than 300; AQI values of 301 or greater are calculated with 1-hour ozone concentrations. 1-hour SO 2 values do not ...

  8. Merced County is one of the country’s most polluted places to ...

    www.aol.com/merced-county-one-country-most...

    Fresno, Madera, Kern and Kings counties are all among the top 10 for three categories of air pollution — daily or short-term particle pollution, annual particle pollution and ozone pollution.

  9. Air pollution - Wikipedia

    en.wikipedia.org/wiki/Air_pollution

    Various studies have estimated the impacts of air pollution on agriculture, especially ozone. A 2020 study showed that ozone pollution in California may reduce yields of certain perennial crops such as table grapes by as much as 22% per year, translating into economic damages of more than $1 billion per year. [231]