evidence: The results have been dramatic. Around 99 per cent of ozone-depleting substances have been phased out and the protective layer above Earth is being replenished. The Antarctic ozone hole is expected to close by the 2060s, while other regions will return to pre-1980s values even earlier. Every year, an estimated two million people are saved from skin cancer and there are broader benefits too, as many of the ozone-depleting gases also drive up global temperatures. A recent study has shown that without the Montreal Protocol ban on CFCs, lesser carbon would have been stored in plants, vegetation and soil; which might have led to an additional 0.5–1.0 degrees celsius of global warming. [...] Although tremendous progress has been made, the hole will take decades yet to heal, and only if there is full and continuous compliance with the Montreal Protocol. We also need to continue monitoring the atmosphere, even for supposedly banned substances, like CFC-11, and for the possible effects rising surface temperatures in polar regions may have on stratospheric ozone.