Welcome To Ozone
The ozone layer is a region of high ozone concentration in the stratosphere, 20 to 30 kilometres above Earth's surface.
The ozone layer acts as an invisible shield and protects us from harmful ultraviolet (UV) radiation from the sun. In particular, the ozone layer protects us from the UV radiation, known as UV-B, which causes sunburn.
Causes and Effects
Ozone Layer depletion
The Ozone layer depletion is normally caused by human activities and human made chemicals especially manufactured halocarbon refrigerants, solvents, propellants and foam-blowing agents that bring chlorine and bromineto the stratosphere, causing then the depletion of ozone layer.
Long-term exposure to high levels of UV-B can severely damage most animals, plants and microbes, so the ozone layer protects all life on Earth.
The Kigali Amendment
A successful HFC phasedown is expected to avoid up to 0.4 degree Celsius of global temperature rise by 2100, while continuing to protect the ozone layer.
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HCFCs & CFCs
The Ozone layer depleting substances include Chlorofluorocarbons (CFCs), Hydrochlorofluorocarbons (HCFCs), Hydrobromofluorocarbons (HBFCs), Halons, Methyl bromideandCarbon tetrachloride.
The ozone layer today
As of now 99% of the ozone-depleting substances that are controlled under the Montreal Protocol have been phased out.
Damage to human health, Large-scale ozone depletion would dramatically increase the amount of UV-B exposure, significantly increasing the risk of major health issues worldwide.
“Great Green Wall” in Africa
The Sahara Desert has expanded by 10 per cent since 1920, eliminating grazing land and waterholes in its way, and imposing financial ruin for nearby villages.