During the 1960’s-1970’s, we were in a place where tech advancements were growing at a breakneck pace, but we didn’t really understand the environmental impact of them. During that time, where were tons of environmental disasters, like rivers catching fire and cities suffocating in smog. One of the most important issues, however, was the ozone layer.

In 1985, scientists found that a certain group of chemicals that were widely used, were tearing a hole in our atmosphere, and if we didn’t stop asap, there’d be nothing to protect us from harmful radiation from space. Thankfully, the world banded together to limit and outright ban the use of CFCs, to allow our ozone layer to grow back.