ozone depletion

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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.
References in periodicals archive ?
The initiative, emailed this morning to more than 2,000 atmospheric scientists worldwide, challenges any scientist or team of scientists to demonstrate experimentally that the 15% increase in carbon dioxide observed from 1970-1998 caused more global warming than observed contemporaneous depletion of the ozone layer of up to 60%.
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.
Due to continuous depletion of the ozone layer, growing number of industrial unitsand 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.
Description : the 1970s, scientists discovered certain man-made compounds contributed to the depletion of the Ozone Layer.
Global warming and the gradual depletion of the ozone layer are undoubtedly massive threats that need to be addressed immediately because it affects the whole of humanity on a larger scale.
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 program was launched in 2001 and presented lectures on various environmental issues such as the greenhouse effect (or global warming), depletion of the ozone layer, acid rain, reduction of the adverse impact of depleted natural resources and visited 296 schools from which more than 21,962 students attended the program lectures.
Depletion of the Ozone Layer, has emerged as a major threat to the world environment as well as to the public health and it is since 1995, that the United Nations Organization under its Environment Program, observes September 16, each year as the day for preservation of Ozone Layer.
The Ozone Center specialists say it is necessary to raise public awareness about problems of depletion of the ozone layer.