ozone depletion

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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 ?
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 that although Pakistan does not manufacture any of the Ozone Depleting Substances, the country has a strict regulatory regime to check imports of these substances, with a system of licensing and quotas for import of HCFCs in place.
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.
Since 1989, the Montreal Protocol and associated agreements have restricted ozone depleting substances across the world.
In accordance with the theme for this year's celebration "Ozone Layer Protection: The Mission Goes On," Head of the national committee for the ozone protection at EPA Ayman Bojbarah said that individuals and companies using ozone depleting substances should try to limit their use to make further progress in positive steps that have been taking by the state of Kuwait to protect the ozone layer from damage.
The bylaw aims at ensuring more control on the ozone depleting materials, combatting illegal trade in such materials and ensure compliance of the Sultanate to the requirements of the Montreal Protocol on Substances that Deplete the Ozone Layer, which was approved by the Sultanate as per the Royal Decree No 73/98.
In a company or a factory one can be an ozone-friendly officer or worker by identifying which existing equipments like watercoolers, air conditioners, cleaning solvents, fire extinguishers and the products it buys like aerosol sprays, foam cushions/mattresses use ozone depleting substances.
Qatar's total consumption of ozone depleting substances surged 43% to 2,027 metric tonnes (MT) in 2010 mainly due to a three-fold rise in hydrochlorofluorocarbons (HCFC), official figures show.
Environment and Natural Resources Secretary Ramon Paje said the government has decided to set a limit on the import of hydrochlorofluorocarbons (HCFCs), a group of ozone depleting substances (ODS), starting 2013.
The Center is tasked to ensure compliance with the commitments undertaken by Kyrgyzstan after signing the Montreal Protocol on ozone depleting substances and to implement the state program on ceased use of ozone depleting substances.
He expressed these views while addressing an international seminar "Phase out and Impact of Ozone Depleting Substances and Energy Efficiency in Defence Applications" at a hotel in Bhurban.