ozone depletion

(redirected from Depletion of the ozone layer)

ozone depletion

The ongoing reduction of ozone in the stratosphere. Ozone (O3) is present in 1 ppm in the upper stratosphere, and it absorbs virtually all of the UV radiation from the sun; increased rates of sun-induced malignancies (e.g., melanomas) have been attributed to the destruction of the ozone layer. Ozone depletion is caused by the release of chloride ions from CFCs (chlorofluorocarbons) after release from air conditioners, spray cans, and manufacturing plants that produce electronics and plastics. CFCs degrade in the atmosphere, release chlorine and cause ozone destruction, remain free, or react with ozone to form ClO (chlorine monoxide); O3 is being depleted at a rate of 4–5% per decade.
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The nations however made an agreement which tried to limit the use of substances which would result in the depletion of the ozone layer.
The programme includes visits company engineers make to schools to provide environmental lectures in Arabic and English, during which they focus on the most important environmental topics being discussed at the global level including, but not limited to, the phenomenon of global warming, depletion of the ozone layer and acid rain.
These activities aim to raise awareness and create political momentum on concerns such as the depletion of the ozone layer, toxic chemicals and climate change.
The Montreal Protocol was established in 1987 to address the depletion of the ozone layer by harmful substances.
The Anthropocene is a concept/term originally developed by Dutch atmospheric chemist Paul Crutzen, who won the Nobel Prize in 1995 for his work on the depletion of the ozone layer.
Due to continuous depletion of the ozone layer, growing number of industrial units and increasing vehicle fleet size in the country, there has been rise in level of air pollution because of which people are exposed to high risk of various respiratory and cardiovascular diseases.
The depletion of the ozone layer by man-made chemicals was discovered in the mid-1970s.
The environmental consequence of this discovery was that, since stratospheric ozone absorbs most of the ultraviolet-B (UV-B) radiation reaching the surface of the planet, depletion of the ozone layer by CFCs would lead to an in increase in UV-B radiation at the surface, resulting in an increase in skin cancer and other impacts such as damage to crops and to marine phytoplankton.
The protesters raised slogans against the meet and accused the US and European nations of releasing hazardous chemicals in the environment and contributing to the depletion of the ozone layer.
Environmental challenges have become more acute as they are related to air quality, sea and water pollution, land degradation, waste treatment, the depletion of the ozone layer and global warming, and because of their nature they have impacts on all countries and regions without exception, and they are exceeding the limits of politics and geography," he said.
Weld Professor of Atmospheric Chemistry, are warning that a newly-discovered connection between climate change and depletion of the ozone layer over the U.
The Ozone Center specialists say it is necessary to raise public awareness about problems of depletion of the ozone layer.