<prompt> Bheka isigaba esingezansi bese uphendula umbuzo emva kwalokho ngolimi olufanayo nesigaba: Isethulo: Lesi sivumelwano sakhiwe ngamaqembu amaningana ama-hydrocarbon ane-halogen acekela phansi i-stratospheric ozone. Zonke izinto ezicekela phansi i-ozone ezilawulwa yiMontreal Protocol ziqukethe i-chlorine noma i-bromine izinto eziqukethe i-fluorine kuphela azilimazi ungqimba lwe-ozone. Ezinye izinto ezicekela phansi i-ozone ODSs azikalawulwa yiProtocol yaseMontreal, kufaka phakathi i-nitrous oxide N2O Ukuze uthole itafula lezinto ezicekela phansi i-ozone ezilawulwa yiProtocol yaseMontreal bheka:Kweqembu ngalinye le-ODSs, isivumelwano sinikeza uhlelo lwesikhathi lapho ukukhiqizwa kwalezo zinto kufanele kukhishwe khona futhi ekugcineni kuqedwe. Lokhu kwakuhlanganisa iminyaka eyishumi yokungeniswa kwamazwe asathuthuka okukhulunywa ngawo esigabeni 5 salesi sivumelwano. Umbuzo: Yiliphi iqembu lezinto elinciphisa i-ozone ye-stratospheric?  <response>: ama-halogenated hydrocarbons 