Ricou Palencia (Economist)

They have different cell shapes. Like flat, cube, or tall. They also have different layers. Some are one layer, and some are many layers.

The main goal is to protect our ozone layer. This layer is high up and it is like a shield. It protects us from the sun's bad rays. Some chemicals we used in old fridges and spray cans were making a hole in it. So, many countries agreed to stop making and using these bad chemicals. This helps the ozone layer to heal and fix the hole. It is a plan for the whole world to work together.