<P> The main cause of ozone depletion and the ozone hole is man - made chemicals , especially man - made halocarbon refrigerants , solvents , propellants , and foam - blowing agents ( chlorofluorocarbon ( CFCs ) , HCFCs , halons ) , referred to as ozone - depleting substances ( ODS ) . These compounds are transported into the stratosphere by the winds after being emitted at the surface . Once in the stratosphere , they release halogen atoms through photodissociation , which catalyze the breakdown of ozone ( O ) into oxygen ( O ) . Both types of ozone depletion were observed to increase as emissions of halocarbons increased . </P>
<P> The main cause of ozone depletion and the ozone hole is man - made chemicals , especially man - made halocarbon refrigerants , solvents , propellants , and foam - blowing agents ( chlorofluorocarbon ( CFCs ) , HCFCs , halons ) , referred to as ozone - depleting substances ( ODS ) . These compounds are transported into the stratosphere by the winds after being emitted at the surface . Once in the stratosphere , they release halogen atoms through photodissociation , which catalyze the breakdown of ozone ( O ) into oxygen ( O ) . Both types of ozone depletion were observed to increase as emissions of halocarbons increased . </P>
which gas is responsible for depletion of ozone layer around earth
which gas is responsible for depletion of ozone layer around earth
halogen
halogen