What will happen before the year 2100

The ozone layer will be completely healed by 2075

We don’t hear much about the ozone layer lately, but in the ’70s and ’80s, the humongous hole created by chlorofluorocarbons (CFCs), harmful chemicals found in spray cans, air conditioners, and other culprits emerged as one of the biggest threats to our civilization. If it got any bigger, we feared, the Sun’s ultraviolet rays would freely rain down on us and quickly roast us alive.

Thankfully, once scientists realized what was drilling the hole, numerous steps were taken to reduce using the chemicals causing it. Since then, the ozone layer has been slowly but surely healing itself. In 2014, a 300-scientist-strong United Nations report reported the first significant increase in ozone volume since it started to go away. Still, it’s a slow process; according to the UN report, the ozone layer won’t go back to what it was in the ’80s until 2050. It won’t be until 2075, meanwhile, that the most damaged part of the layer — the area over the Antarctic — will fully recover. At its worst, the Antarctic hole measured over 30 million square kilometers. It’s currently around 20 million, which is still way too big for a hole that decides whether we turn into a water world.