Tags: ozone


Tuesday, July 20th, 2021

What would have happened if we never fixed the ozone hole?

We may not live in the best of all possible worlds, but we have dodged some bullets:

In the annals of environmental history, humanity’s response to the ozone crisis stands out as a rare success story. During the 1970s and ‘80s, evidence started to mount that certain household chemicals used in refrigerators, air conditioners, and aerosol cans like hairspray were eating a giant hole in Earth’s ozone layer, which prevents harmful ultraviolet radiation from reaching the surface. Facing the terrifying prospect of a future without any atmospheric sunscreen at all, in the late 1980s nations came together to sign the Montreal Protocol, a global treaty to phase out so-called ozone-depleting substances like chlorofluorocarbons.

But if things hadn’t turned out that way—if the scientific evidence linking man-made chemicals to ozone depletion wasn’t strong enough, or if ozone deniers (yes, there were ozone deniers) successfully stymied the Montreal Protocol—the world might look very different.