What if someone told you there was a giant HOLE in the sky — and you helped fix it?

The Day the World United to Save the Ozone Layer!

How scientists discovered a giant hole in Earth's invisible shield

The whole world teamed up to fix a hole in Earth's invisible shield — and it's working!

Way up in the sky, about 15 miles above your head, there's an invisible shield called the ozone layer. It protects us from the Sun's harmful rays — kind of like Earth's own sunscreen!

But on July 1, 1987, something amazing happened. Countries from all around the world started working together on a plan to fix a HUGE problem: the ozone layer was getting a hole in it!

Scientists had discovered that chemicals called CFCs (say "see-eff-sees") were eating away at our protective shield. These chemicals were in things people used every day — spray cans, refrigerators, and air conditioners. The hole was mostly over Antarctica, and it was getting bigger every year!

This was scary news, but here's the cool part: the world actually DID something about it! On this day, negotiations began that would lead to the Montreal Protocol — a promise between almost every country on Earth to stop using those harmful chemicals.

💡 The ozone hole over Antarctica was so big it could fit about 3 million Earths inside it at its worst point in 2006!