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.
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.
The award honors the company's innovation, investment and commitment to protect the environment through its efforts to develop alternatives to methyl bromide, an ozone-depleting substance being phased out under the Protocol.
Use of this ozone-depleting substance is banned in products classified as non-essential, including plastic foam products.
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.
have agreed to pay penalties of $15,000 each to settle alleged violations of the Clean Air Act involving use of an ozone-depleting substance in the manufacture of plastic foam products.
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 federal C 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.
On a corporate-wide basis, ozone-depleting substance emissions were reduced by 34 percent between 1989 and December 1991.