Good news for ozone hole
It seems that the banning of CFCs has indeed halted the destruction of the ozone layer, with the hole over Antarctica shrinking since its peak size in 2003. (Recall that the ozone layer is responsible for filtering harmful UV radiation…)
Even so, it’s scary - the hole is about 27 million square kilometres, and there are no guarantees how quickly it will recover - after all, CFCs were banned 20 years ago, and we’re only now seeing a real difference (though I imagine the rate of increase has been slowing since then? The harmful gases, chlorine and bromine, in CFCs take quite a while to diffuse through the atmosphere.)