UV light breaks a chlorine atom off a CFC molecule. The chlorine reacts with ozone (O3), forming molecular oxygen (O2) and chlorine monoxide. The oxygen is pulled off that molecule by a free oxygen atom, leaving the chlorine atom to start the process all over again.
Ozone-depleting CFC products: furniture cushion foam, extruded polystyrene foam insulation (boards on the floor), polyisocyanurate foam (in background), auto air conditioner, refrigerator, halon fire extinguisher, photographic dust remover, auto air conditioner recharge kit, and foam sealant.
PHOTO: MICHAEL SOLURI