What are ozone depletion substances?
Ozone depleting substances are chemicals that destroy the earth’s protective ozone layer. They include: chlorofluorocarbons (CFCs) halons. carbon tetrachloride (CCl4)
What compounds contribute to ozone depletion?
This page provides information on compounds recognized as ozone-depleting substances ( ODS. ODS include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), halons, methyl bromide, carbon tetrachloride, hydrobromofluorocarbons, chlorobromomethane, and methyl chloroform.
What are ozone depleting substances give examples?
The main uses of ozone depleting substances include: CFCs and HCFCs in refrigerators and air conditioners, CFCs and HCFCs in foam, CFCs and HCFCs as aerosol propellants, and.
What is ozone depletion and what causes it?
The main cause of ozone depletion and the ozone hole is manufactured chemicals, especially manufactured halocarbon refrigerants, solvents, propellants, and foam- blowing agents (chlorofluorocarbons (CFCs), HCFCs, halons). ODS substances have a lifetime of about 100 years.
How do ozone-depleting substances affect ozone shield?
Ozone depleting substances are man-made gases that destroy ozone once they reach the ozone layer. The ozone layer sits in the upper atmosphere and reduces the amount of harmful ultra violet radiation that reaches Earth from the sun.
Which compound has the lowest ozone depletion potential?
Hydrofluorocarbons (HFC) have no chlorine content, so their ODP is essentially zero.
How hydrocarbons deplete the ozone layer?
Ultraviolet Radiation A type of hydrocarbons that are nonreactive, nonflammable organic molecules in which both chlorine and fluorine atoms replace some of the hydrogen atoms. Use of CFCs is one of the primary causes of stratospheric ozone depletion. A form of oxygen in which three atoms of oxygen occur together.
How do ozone-depleting substances destroy ozone molecules?
Ozone Depletion. When chlorine and bromine atoms come into contact with ozone in the stratosphere, they destroy ozone molecules. One chlorine atom can destroy over 100,000 ozone molecules before it is removed from the stratosphere.
What is ozone depletion Class 10?
Ozone layer depletion is the thinning of the ozone layer present in the upper atmosphere. This happens when the chlorine and bromine atoms in the atmosphere come in contact with ozone and destroy the ozone molecules. One chlorine can destroy 100,000 molecules of ozone.
What is ozone hole Class 10?
The increase in heat and depletion of ozone around the Earth’s Polar Regions is called the ozone hole. As the ozone molecules are broken down they are now unable to absorb the UV radiations and we experience the intense UV radiation on the earth surface.