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.
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In February this year, the National Agency for Food and Drug Administration and Control (NAFDAC), an agency under the control of the Federal Ministry of Health, announced the placing of a ban on the use of methyl bromide for pest control with reason being that the use of the agrochemical contributes to depletion of Ozone layer.
This layer is where the active chemical depletion of ozone occurs on polar stratospheric clouds.
However, the purpose of celebration is to spread awareness of the depletion of ozone layer and seek out solutions to preserve it.
Chlorofluorocarbons are chemicals that are used in perfumes and air freshener cans because their exceedingly volatile characteristic, however, these chlorofluorocarbons are non-decomposable hence they result in the depletion of ozone layer: our only protection against the Ultraviolent rays of the sun whose entrance results in massive rise of the temperature of the Earth.
Which is why the continued depletion of ozone in lower latitudes caught scientists somewhat by surprise.
During the symposium on Ways to Mitigate Global Warming spearheaded by the Diocesan School Science Club and participated by the secondary students held at the Municipal Gymnasium in Tago town, this province, Concha, in his message read by PENRO information officer Johny Natad, urged all the students to help avert the impact of global warming and depletion of ozone layer.
The day is mainly intended to spread awareness of depletion of Ozone Layer and search for solutions to preserve it.
Depletion of Ozone Layer, he said, was one of the most serious environmental concerns threatening the very existence of life on earth.
The depletion of ozone had the potential to adversely impact life on Earth.
NASA and NOAA have a mandate under the Clean Air Act to monitor ozone-depleting gases and stratospheric depletion of ozone. NOAA complies with this mandate by monitoring ozone via ground and satellite measurements.
Curve C shows extended chemical depletion of ozone from approximately 15 to 25 km and diminishing loss to 28 km relative to the outside vortex distribution (Curve A).
Global impacts of air pollution result from sources that may potentially change the upper atmosphere for example depletion of ozone layer and global warming.