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What (who) is ozone depletion - definition
Ozone depletion
![TOMS]] each year in the ozone hole](https://commons.wikimedia.org/wiki/Special:FilePath/Min ozone.jpg?width=200 "TOMS]] each year in the ozone hole")
![DU/km]]) and blocking of different bands of ultraviolet radiation: In essence, all UVC is blocked by diatomic oxygen (100–200 nm) or by ozone (triatomic oxygen) (200–280 nm) in the atmosphere. The ozone layer then blocks most UVB. Meanwhile, UVA is hardly affected by ozone, and most of it reaches the ground. UVA makes up almost all UV light that penetrates the Earth's atmosphere.](https://commons.wikimedia.org/wiki/Special:FilePath/Ozone altitude UV graph.svg?width=200 "DU/km]]) and blocking of different bands of ultraviolet radiation: In essence, all UVC is blocked by diatomic oxygen (100–200 nm) or by ozone (triatomic oxygen) (200–280 nm) in the atmosphere. The ozone layer then blocks most UVB. Meanwhile, UVA is hardly affected by ozone, and most of it reaches the ground. UVA makes up almost all UV light that penetrates the Earth's atmosphere.")
![[[Radiative forcing]] from various greenhouse gases and other sources](https://commons.wikimedia.org/wiki/Special:FilePath/Radiative-forcings.svg?width=200 "[[Radiative forcing]] from various greenhouse gases and other sources")
STRATOSPHERIC PHENOMENA OF EARTH
Ozone hole; Ozone Depletion; Ozone depletion theory; Ozone Hole; Ozone depleter; Discovery of ozone depletion; Ozone depleting substance; Ozone-depleting substance; Depletion of the ozone layer; Depletion of ozone; Rowland-Molina reaction; Ozone layer depletion; Ozone depleting; Ozone depleting chemical; The depletion of the ozone layer; Ozone depletors; Ozone Depleting Substance; Reduction of stratospheric ozone; Ozone depletion research; Ozone damage; Ozone-depleting chemical; Antarctic ozone hole; Ozone Layer Depletion; Hole in the ozone layer; Hole in the ozone; Common misconceptions about ozone depletion; Ozone destruction; Ozone Depleting Substances
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, and a much larger springtime decrease in stratospheric ozone (the ozone layer) around Earth's polar regions. The latter phenomenon is referred to as the ozone hole.
ozone hole
STRATOSPHERIC PHENOMENA OF EARTH
Ozone hole; Ozone Depletion; Ozone depletion theory; Ozone Hole; Ozone depleter; Discovery of ozone depletion; Ozone depleting substance; Ozone-depleting substance; Depletion of the ozone layer; Depletion of ozone; Rowland-Molina reaction; Ozone layer depletion; Ozone depleting; Ozone depleting chemical; The depletion of the ozone layer; Ozone depletors; Ozone Depleting Substance; Reduction of stratospheric ozone; Ozone depletion research; Ozone damage; Ozone-depleting chemical; Antarctic ozone hole; Ozone Layer Depletion; Hole in the ozone layer; Hole in the ozone; Common misconceptions about ozone depletion; Ozone destruction; Ozone Depleting Substances
¦ noun a region of marked thinning of the ozone layer in high latitudes, chiefly in winter, due to CFCs and other atmospheric pollutants.
Ozone depletion and climate change
![Sir Robert (Bob) Watson]] played an important role in both cases](https://commons.wikimedia.org/wiki/Special:FilePath/Bob Watson.jpg?width=200 "Sir Robert (Bob) Watson]] played an important role in both cases")
Ozone depletion and climate change, or Ozone hole global warming in more popular terms, are environmental challenges whose connections have been explored and which have been compared and contrasted, for example in terms of global regulation, in various studies and books.
Examples of use of ozone depletion
1. Alteration of atmospheric composition, stratospheric ozone depletion, climate change, and land cover change were among the phenomena detected.
2. Ozone depletion was the first time humans really became aware of their negative effect on the environment.
3. Today, from the United Nations to the World Trade Organization, from agreements on ozone depletion to pacts on nuclear weapons, China is a player at the table.
4. Syed Bashir Ahmed, vice president, finance and multimedia, spoke about ozone depletion followed by the rendering of a poem by PWC’s vice president Choudhry Rehmat Ali.
5. As head of EPA‘s Office of Air and Radiation, Holmstead oversees programs addressing global climate change, industrial and vehicle pollution, acid rain, ozone depletion, radiation protection, and indoor air quality.