ozone depletion

(redirected from Ozone depleting)

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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References in periodicals archive ?
The Montreal Protocol on Substances that Deplete the Ozone Layer is, meanwhile, a multilateral environmental agreement that regulates the production and consumption of nearly 100 man-made chemicals referred to as ozone depleting substances.
News Desk The government has taken a HCFC Phase-out Manag-ement Plan (Stage-II) aiming to phase out the ozone depleting substances (ODSs) and help protect the planet's ozone layer that safeguards the lives on the earth from harmful cosmic radiation.
As much as 99 percent of ozone depleting substances (ODS) have been withdrawn from use in Turkmenistan, Trend reports citing the Neutral Turkmenistan newspaper.
'Although a limited amount (2.5%) of ozone depleting refrigerants will remain available between 2030 and 2040 for servicing already installed A/C and refrigeration equipment, it will not be sufficient to replenish the needs of old equipment, unless conversion to alternative refrigerants in new equipment is implemented soon,' he added.
Philippines to phase out last ozone depleting substances !-- -- Rhodina Villanueva (The Philippine Star) - October 4, 2018 - 12:00am MANILA, Philippines ThePhilippines is focused on phasing out the supposed last batch of ozone-depleting substances (ODS) ndash the hydrochlorofluorocarbons or HCFCs ndash ahead of the 27-year schedule from 2013 to 2040.
Cimatu reported on Tuesday that the Philippines is 'on track' in phasing out ozone depleting substances (ODS) as part of its commitment to the Montreal Protocol.
Officially opening the meeting for ozone officers from English and French speaking countries on behalf of Minister Tshekedi Khama, Mr Thabang Botshoma said the objective of the Vienna Convention was to control and phase out ozone depleting substances (ODSs).
'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,' said an official of the ministry of the climate change.
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 that the country had been at the forefront in endeavours to phase out use of ozone depleting substances, according to a message received here.
The amount of reduction in these ozone depleting compounds was (http://cires.colorado.edu/news/ozone-treaty-taking-bite-out-us-greenhouse-gas-emissions) equal to a 170 million ton reduction in CO2.
Sajjad Ahmad Bhutta, Natioal Ozone Cell Project Director, MoCC said, It is motivating to note that Pakistan is en route to wipe out Ozone depleting substances and is in full consistence with the objectives set-out by the International ozone bodies.