ozone depletion

(redirected from Ozone-depleting substance)

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 ?
Washington, August 28 (ANI): A new study has determined that nitrous dioxide, popularly known as 'laughing gas', has now become the largest ozone-depleting substance emitted through human activities, and is expected to remain the largest throughout the 21st century.
Results of an analysis showed the products contained a banned ozone-depleting substance.
Halon 1301 is a Class I ozone-depleting substance, which is harmful to the environment.
The EPA identifies methyl bromide as a Class I ozone-depleting substance that will be phased out under the Clean Air Act.
As of May 15, 1993, any container or product containing or manufactured with an ozone-depleting substance must be labeled with a warning informing the customer of that fact.
This includes using glazes and top coats at near zero VOC (volatile organic compound) emission, which is an ozone-depleting substance.
During the same year, developed and developing nations should eliminate bromochloromethane, a relatively new ozone-depleting substance.
MB was alleged to be an ozone-depleting substance more than a decade ago and is being phased out.
The settlement resolves allegations that Safeway violated the Clean Air Act by failing to promptly repair leaks of HCFC-22, a hydro-chlorofluorocarbon that is a greenhouse gas and ozone-depleting substance used as a coolant in refrigerators, and failed to keep adequate records of the servicing of its refrigeration equipment.
The country has been at the forefront in its endeavours to phase out use of Ozone Depleting Substances (ODSs) Because, ridding the world of 13 different ozone-depleting substances (ODSs), including hydro-chloro-fluoro-carbons (HCFC) and chloro-fluoro-carbons (CFC), is critical to protecting the ozone layer, which protects all life on earth from adverse fallouts of the ultraviolet (UV) radiation from the sun and its spill-over effect of environment, the minister emphasised while addressing the high-level ministerial segment of the Joint 11th Conference of the Parties to the Vienna Convention and 29th Meeting of the Parties to the Montreal Protocol held in Montreal, Canada.
He said ridding the world of 13 different ozone-depleting substances (ODSs), including hydro-chloro-fluoro-carbons (HCFC) and chloro-fluoro-carbons (CFC), was critical to protecting the ozone layer, which protected all life
Our use of ozone-depleting substances such as chlorofluorocarbons (CFCs) had torn a hole in the ozone layer that protects us from the sun's harmful ultraviolet radiation.