Shrinking ozone hole heralds success of global treaties

In 1987 the world came together via the UN, and signed the historic Montreal Protocol on Substances That Deplete the Ozone Layer. The participating countries passed legislation banning industry from using chlorofluorocarbon (CFC), hydrochloroflourocarbon (HCFC) and other ozone depleting substances. CFCs, scientists told us in peer-review research, gobble up the ozone layer by releasing chlorine