The Vienna Convention is like a big group of grown-ups who got together and made a promise to protect something called the ozone layer. This ozone layer is like a blanket that covers the Earth and helps to protect us from the sun's harmful rays.
The grown-ups are from different countries and they all agreed to work together to make sure the ozone layer stays healthy. They made rules and promises to stop using things that can hurt the ozone layer, like chemicals that are used in fridges and air conditioners.
The grown-ups also made a plan to help countries that need it, to make sure they can also protect the ozone layer. They share information and help each other out.
So, the Vienna Convention is a way for grown-ups to work together and make sure that the ozone layer stays healthy, just like how parents work together to keep their kids safe and healthy.