Destruction of the earth's ozone layer, which can be caused by the photolytic breakdown of certain chlorine- and/or bromine-containing compounds (e.g., chlorofluorocarbons),which catalytically decompose ozone molecules.
The thinning of the earth’s protective stratospheric ozone layer. Ozone depletion occurs when the natural balance between the production and destruction of stratospheric ozone is tipped in favour of destruction. Human activity is the major factor in tipping that natural balance, mostly from artificial chemicals, known as ozone- depleting substances (ODS).
is caused by the release of Ozone Depleting Substances such as CFCs and HCFCs, which are used as refrigerants and insulting foam.
Decrease in concentration of ozone (O3) in the stratosphere. See ozone layer.
Destruction of ozone in the ozone layer attributed to the presence of chlorine from manmade CFCs and other forces. The layer is thinning because ozone is being destroyed at a faster rate than it is being regenerated by natural forces.
destruction of the stratospheric ozone layer, which shields the earth from ultraviolet radiation. This destruction is caused by the breakdown of certain chlorine and/or bromine-containing compounds (chlorofluorocarbons or halons) that catalytically destroy ozone molecules in the stratosphere
Chemical destruction of the stratospheric ozone layer beyond natural reactions. Stratospheric ozone is constantly being created and destroyed through natural cycles. Various ozone-depleting substances (ODS), however, accelerate the destruction processes, resulting in lower than normal ozone levels. Because ozone absorbs UVB, less ozone will allow more of this harmful solar radiation to reach the Earth's surface. The science section of EPA's ozone depletion Web site offers much more detail on the science of ozone depletion.
Destruction of the stratospheric ozone layer, which shields earth from ultraviolet radiation harmful to life. This destruction of ozone is caused by the breakdown of certain compounds that contain chlorine, bromine, or both (chlorofluorocarbons or halons), which occurs when they reach the stratosphere and then catalytically destroy ozone molecules.
The reduction in the layer of ozone gas, found at the top of Earth's atmosphere, which absorbs most of the ultraviolet radiation (UVR) coming from the sun. Ozone depletion decreases the absorption of UVR, which allows more of the harmful rays to penetrate to Earth's surface.
Chemical destruction of the stratospheric ozone layer over and above natural processes.
Stratospheric ozone (O3) is formed from the conversion of oxygen (O2) molecules by solar radiation. It absorbs much ultraviolet (UV) radiation and prevents it from reaching the Earth. Certain ozone depleting substances (ODSs) are reducing the amount of ozone that absorbs this UV radiation.
Destruction of the stratospheric ozone layer which shields the earth from ultraviolet radiation harmful to life. This destruction of ozone is caused by the breakdown of certain chlorine and/or-bromine containing compounds (chlorofluorocarbons or halons), which break down when they reach the stratosphere and then catalytically destroy ozone molecules.
The reduction of the ozone layer, which filters ultra violet rays from the sun, due to the release of certain gases e.g. CFCs.
Degradation of stratospheric ozone due to the photo-chemical reaction of ozone, primarily with CFCs. A global phenomenon with regional variations, characterized by holes in the ozone layer over the Antarctic, the Arctic and other regions.
Accelerated chemical destruction of the stratospheric ozone layer by the presence of substances produced mostly by human activities. The most depleting species for the ozone layer are the chlorine and bromine free radicals generated from relatively stable chlorinated, fluorinated, and brominated products by ultraviolet radiation.
The reduction of ozone (O3) in the upper atmosphere as a result of human-produced chemicals, such as CFCs. Recent evidence suggests that ozone depletion in the upper atmosphere may affect climatic patterns on the Earth's surface.
ozone is continuously being created and destroyed. in an unpolluted atmosphere, a natural balance is maintained so that ozone concentration remains relatively constant. Depletion happens when this balance is upset by pollution.
Thinning of the protective layer of the upper atmosphere, known as the ozone layer, by chlorofluorocarbons (CFCs) and other human-created ozone-depleting chemicals (ODCs). The ozone layer is a strong-smelling, slightly bluish gas layer in the stratosphere, 10 to 25 miles above the earth, that shields us from the burning ultraviolet rays of the sun, and traps reflected solar heat around the earth, keeping the earth warm.
Deconstruction of the earthâ€™s ozone layer
certain gases such as CFCs, HCFCs and halons deplete the ozone layer, and are being phased out under the Montreal Protocol.
the natural equilibrium between chemical reactions forming and destroying stratospheric ozone is disturbed by the release of manufactured chemicals
Certain industrial chemicals when released into the atmosphere, break apart and destroy molecules of ozone. Ozone depleting substances are used in refrigeration, air conditioning, foams, solvents, fire extinguishers and aerosol cans. Increased exposure to UV-B radiation, causing quick sunburn, depression of the immune system, and an increased risk of skin cancer in humans and animals. Damage to marine food chains and reduce crop yields. Use baking soda and vinegar instead of chemical aerosol cleaners to clean your home.
refers to the thinning of the stratospheric ozone layer which protects life on Earth from excess ultraviolet radiation from the sun. Human-made halocarbons are primarily responsible for this reduction in the amount of ozone in the stratosphere.
Decrease in the concentration of ozone in the stratosphere.
an erosion of the protective ozone atmospheric level, which may cause a hole through which harmful UV radiation from the sun can cause skin cancer,eye cataracts, inhibit plant growth, and damage the immune system in animals.
Destruction of the stratospheric ozone layer of the earth's athmosphere due to the release of chlorofluorocarbons, or CFCs, into the environment.
Nitrogen oxides, chlorine oxides, hydrogen oxides, and bromine oxides destroy the ozone. Chlorine and bromine reactions are the most detrimental, which include chlorofluorocarbons reactions.
one possible effect of nuclear war. When a nuclear weapon explodes, it creates and disperses many substances that can deplete the protective ozone layer. Passive deterrence-the strategy of threatening a nuclear attack in order to restrain an opponent from itself launching a nuclear attack.
The reduction in the stratospheric ozone layer. Stratospheric ozone shields the Earth from ultraviolet radiation. The breakdown of certain chlorine and/or bromine-containing compounds that destroy ozone molecules in the stratosphere can cause a reduction in the ozone layer.
Stratospheric ozone is necessary to filter out harmful radiation from the sun. Scientists have linked depletion of stratospheric ozone to increased incidence of skin cancer and other disorders and environmental degradation. Under international convention and national laws, governments are prohibiting the production, use, and release of ozone-depleting substances.
the reduction of the protective layer of ozone in the upper atmosphere by chemical pollution.
The term ozone depletion is used to describe two distinct but related observations: a slow, steady decline of about 3 percent per decade in the total amount of ozone in Earth's stratosphere during the past twenty years; and a much larger, but seasonal, decrease in stratospheric ozone over Earth's polar regions during the same period. The latter phenomenon is commonly referred to as the ozone hole.